Baer invariants of crossed modules
The author translates into the language of categories of (pre)crossed modules some results on Baer invariants of groups. This creates a unified procedure for viewing some previously known results, e.g., those by \textit{D. Conduché} and \textit{G. J. Ellis} [Quelques propriétés homologiques des modules précroisés, J. Algebra 123, No. 2, 327-335 (1989; Zbl 0698.18008)].
scientific article; zbMATH DE number 436480