Endomorphism semigroups of groupsPuusemp, PeeterInternational Mathematical Conference honoring D.A. Grave's : 100th year since the beginning of his work at Kyiv University : Kyiv, June 17-22, 20022002 / p. 44

Endomorphism semigroups of groupsPuusemp, Peeter11-th International Conference "Symmetry Methods in Physics"2004 / p. 27