1. J.Dixmier, LesC *-aigèbres et leurs représentations. Paris 1964, 1969.
2. J.Isbell, Epimorphisms and dominions. In: Proceedings of the Conference on Categorical Algebra, La Jolla 1965, Eilenberg, S. et al., eds., Berlin-Heidelberg-New York, 232?246 (1966).
3. V. G.Pestov, Are epimorphisms ofC *-algebras onto? Internet newsgroup sci. math. research posting, 6 April 1994, article No. 2179.
4. V. G. Pestov, New features of noncommutativity in the presence of topology. In: Abstracts of Talks, 1994 New Zealand Mathematical Colloquium, University of Waikato, Hamilton, May 1994.
5. D. Poguntke, Epimorphisms of compact groups are onto. Proc. Amer. Math. Soc.26, 503?504 (1970).