Séminaire Lotharingien de Combinatoire, B29g (1992), 9 pp.
[Formerly: Publ. I.R.M.A. Strasbourg, 1993, 1993/033, p. 65-72.]

M. Kuzma and B. Lulek

The Mac Lane Method of Construction and Classification of Extensions of Cyclic Groups by Their Automorphism Groups

Abstract. The Mac Lane method has been applied to the construction of the second cohomology group in the extension C12 x Aut C12. The method simplifies significantly the difficult problem of construction of nonequivalent extensions and allows to investigate their structure.

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