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Preprints:
 The inverse spectral problem for periodic conservative multipeakon solutions of the CamassaHolm equation,
(with J. Eckhardt), submitted (arXiv:1801.04612)
 Spectral estimates for infinite quantum graphs,
(with N. Nicolussi), submitted (arXiv:1711.02428)
 Spectral theory of infinite quantum graphs,
(with P. Exner, M. Malamud, and H. Neidhardt), submitted (arXiv:1705.01831)
 Jacobi polynomials, Bernsteintype inequalities and dispersion estimates for the discrete Laguerre operator,
(with T. Koornwinder and G. Teschl), submitted (arXiv:1602.08626)
Papers:
 On the HamiltonianKrein Index for a nonselfadjoint spectral problem,
(with N. Nicolussi), Proc. Amer. Math. Soc., to appear (arXiv:1712.01702)
 Dispersion estimates for spherical Schrödinger equations with critical angular momentum, (with M. Holzleitner and G. Teschl),
in "Partial Differential Equations, Mathematical Physics, and Stochastic Analysis", F. Gesztesy et al. (eds), EMS Congress Reports (to appear).
(arXiv:1611.05210)
 The classical moment problem and generalized indefinite strings,
(with J. Eckhardt), Integr. Equat. Oper. Theory 90, 2:23 (2018) (arXiv:1707.08394)

Spectral asymptotics for canonical systems,
(with J. Eckhardt and G. Teschl), J. reine angew. Math. 736, 285315 (2018) (arXiv:1412.0277)
 Infinite quantum graphs,
(with P. Exner, M. Malamud, and H. Neidhardt), Doklady Math. 95, no.1, 3136 (2017)
 Realvalued algebrogeometric solutions of the twocomponent CamassaHolm hierarchy,
(with J. Eckhardt, F. Gesztesy, H. Holden, and G. Teschl), Ann. Inst. Fourier (Grenoble) 67, no.3, 11851230 (2017) (arXiv:1512.03956)
 Quadratic operator pencils associated with the conservative CamassaHolm flow,
(with J. Eckhardt), Bull. Soc. Math. France 145, no.1, 4795 (2017) (arXiv:1406.3703)
 Dispersion estimates for spherical Schrödinger equations: The effect of boundary conditions, (with M. Holzleitner and G. Teschl), Opuscula Math. 36, 769786 (2016) (arXiv:1601.01638)
 Dispersion estimates for the discrete Laguerre operator,
(with G. Teschl), Lett. Math. Phys. 106, 545555 (2016) (arXiv:1510.07019)
 Schrödinger operators with δinteractions in a space of vectorvalued functions,
(with M. Malamud and D. Natiagailo), Math. Notes 100, no.1, 5977 (2016) (arXiv:1603.00594)
 Dispersion estimates for spherical Schrödinger equations,
(with G. Teschl and J. H. Toloza), Ann. Henri Poincaré 17, no.11, 31473176 (2016) (arXiv:1504.03015)
 The inverse spectral problem for indefinite strings,
(with J. Eckhardt), Invent. Math. 204, no.3, 939977 (2016) (arXiv:1409.0139)

On spectral deformations and singular Weyl functions for onedimensional Dirac operators,
(with A. Beigl, J. Eckhardt and G. Teschl), J. Math. Phys. 56, Art ID 012102 (2015) (arXiv:1410.1152)

A note on Jpositive block operator matrices,
Integr. Equat. Oper. Theory 81, 113125 (2015) (arXiv:1403.2406)

Schrödinger operators with δ'interactions on a Cantor type set,
(with J. Eckhardt, M. Malamud and G. Teschl), J. Differential Equations 257, 415–449 (2014) (arXiv:1401.7581)

On a necessary aspect for the Riesz basis property for indefinite Sturm–Liouville problems,
Math. Nachr. 287, no. 1415, 17101732 (2014) (arXiv:1202.2444)

Singular WeylTitchmarshKodaira theory for onedimensional Dirac operators,
(with R. Brunnhuber, J. Eckhardt, and G. Teschl),
Monatsh. Math. 174, 515547 (2014). (arXiv:1305.3099)

The Riesz basis property of an indefinite SturmLiouville problem with nonseparated boundary conditions,
(with B. Ćurgus and A. Fleige),
Integr. Equat. Oper. Theory 77, 533–557 (2013) (arXiv:1306.1329)

An isospectral problem for global conservative multipeakon solutions of the CamassaHolm equation,
(with J. Eckhardt), Comm. Math. Phys. 239, 893–918 (2014) (arXiv:1406.3702)

Spectral analysis of semibounded Schrödinger operators with δ'interactions,
(with M. Malamud),
Ann. Henri Poincaré 15, 501541 (2014) (arXiv:1212.1691)

Spherical Schrödinger operators with δinteractions,
(with S. Albeverio, M. Malamud, and H. Neidhardt),
J. Math. Phys. 54, Art ID: 052103 (2013), 24 pages. (arXiv:1211.4048)

The similarity problem for indefinite Sturm–Liouville operators and the HELP inequality,
Adv. Math. 246, 368–413 (2013) (arXiv:1207.2586)

Spectral analysis of indefinite Sturm–Liouville operators, Funct. Anal. Appl. 48, no.3, 8892 (2014).

Spectral asymptotics for perturbed spherical Schrödinger operators and applications to quantum scattering,
(with G. Teschl)
Comm. Math. Phys. 322, 255275 (2013) (arXiv:1205.5049)

Weyl–Titchmarsh theory for Schrödinger operators with strongly singular potentials,
(with A. Sakhnovich and G. Teschl),
Int. Math. Res. Notices (IMRN), 2012, no. 8, 1699–1747 (2012)
(arXiv:1007.0136)

Commutation methods for Schrödinger operators with strongly singular potentials,
(with A. Sakhnovich and G. Teschl),
Math. Nachr. 285, no. 4, 392–410 (2012) (arXiv:1010.4902)

On the singular Weyl–Titchmarsh function of perturbed spherical Schrödinger operators,
(with G. Teschl),
J. Differential Equations, 250, 3701–3739, (2011) (arXiv:1008.1526)

The similarity problem for indefinite Sturm–Liouville operators with periodic coefficients,
Oper. Matrices 5, no. 4, 707–722 (2011) (arXiv:1004.3991)

Spectral theory of semibounded SturmLiouville operators with local interactions on a discrete set,
(with S. Albeverio and M. Malamud), J. Math. Phys. 51, 102102, 24 pp. (2010)

Inverse eigenvalue problems for perturbed spherical Schrödinger operators,
(with A. Sakhnovich and G. Teschl),
Inverse Problems 26, 105013, 14pp (2010) (arXiv:1004.4175)

1–D Schrödinger operators with local point interactions on a discrete set,
(with M. Malamud),
J. Differential Equations 249, 253–304 (2010) (arXiv:0908.3542)

One dimensional Schrödinger operator with δinteractions,
(with M. Malamud), Funct. Anal. Appl. 44, no. 2, 151–155 (2010)
(MathNet.ru)

Schrödinger operators with δ'interactions and the KreinStieltjes string,
(with M. Malamud), Doklady Math. 81, no. 3, 342–347 (2010)

Longtime asymptotics for the Camassa–Holm equation,
(with A. Boutet de Monvel, D. Shepelsky, and G. Teschl),
SIAM J. Math. Anal. 41, no. 4, 1559–1588 (2009) (arXiv:0902.0391)

On similarity of J–nonnegative Sturm–Liouville operators to self–adjoint operators,
(with I.M. Karabash), Funct. Anal. Appl. 43, no.1, 81–84 (2009)
(MathNet.ru)

The similarity problem for Jnonnegative SturmLiouville operators, (with I.M. Karabash and M.M. Malamud),
J. Differential Equations 246, 964–997 (2009) (arXiv:0803.1496)

Indefinite SturmLiouville operators with the singular critical point zero, (with I.M. Karabash),
Proc. Roy. Soc. Edinburgh A, no.4, 801–820 (2008) (arXiv:0612137)

Similarity of some J–nonnegative operators to self–adjoint operators,
Math. Notes, 80, no. 1, 135–138 (2006)
(MathNet.ru)

A spectral analysis of some indefinite differential operators,
Methods Funct. Anal. Topology, 12, no. 2, 157–169 (2006).

The Krein string and characteristic functions of nonselfadjoint operators,
Zapiski Nauchnih Seminarov POMI, 327 (2005), 115–134
(MathNet.ru)

On similarity to a self–adjoint one of some indefinite Sturm–Liouville operators with singular potential,
Math. Notes, 78, no. 1, 147–151 (2005)
(MathNet.ru)

Spectral analysis of nonselfadjoint operators type (sgnx) (D2 + aD + bI + cδ),
Reports of the NAS of Ukraine, no. 8, 24–29 (2004)

Similarity of (sgn x)(D2+cδ) type operators to normal and self–adjoint operators, (with I.M. Karabash),
Math. Notes, 74, no. 1, 127–131 (2003)
(MathNet.ru)

On the instability index of quadratic self–adjoint operator pencils,
Math. Notes 72, 285–290 (2002)
(MathNet.ru)
Review Articles:
 The CamassaHolm equation and the string density problem,
(with J. Eckhardt and G. Teschl), Intern. Math. Nachr. 233, 124 (2016) (arXiv:1701.03598)

1D Schrödinger operators with local point interactions: a review, (with M. Malamud),
in "Spectral Analysis, Integrable Systems, and Ordinary Differential Equations", H. Holden et al. (eds),
Proceedings of Symposia in Pure Mathematics 87, Amer. Math. Soc., (2013), 235262
(arXiv:1303.4055)
Refereed Papers in Proceedings:
 Inverse uniqueness results for onedimensional weighted Dirac operators,
(with J. Eckhardt and G. Teschl, ),
in "Spectral Theory and Differential Equations: V.A. Marchenko 90th Anniversary Collection", E. Khruslov, L. Pastur, and D. Shepelsky (eds), 117133, Advances in the Mathematical Sciences 233, Amer. Math. Soc., Providence, 2014.
arXiv:1305.3100

Spectral analysis of differential operators with indefinite weights and a local point interaction, (with I.M. Karabash),
Oper. Theory: Adv. and Appl. 175, 169–191 (2007).

Spectral analysis of some indefinite Sturm–Liouville operators,
Operator theory 20, 131–141, Theta Ser. Adv. Math., 6, Theta, Bucharest, 2006.