ASIAN-EUROPEAN JOURNAL OF MATHEMATICS, cilt.8, sa.4, 2015 (ESCI)
In this paper, we determine necessary and sufficient conditions for Bruck-Reilly and generalized Bruck-Reilly *-extensions of monoids to be unit regular, completely regular and orthodox. In addition, we characterize the congruences on generalized Bruck-Reilly *-extension of a monoid.