Congruence-preserving functions on Stone and Kleene algebras Vladimir KuchmeiMiroslav Ploščica Original Paper Pages: 419 - 434
The Berman conjecture is true for nilpotent extensions of regular semigroups Igor DolinkaPetar Marković Mailbox Pages: 435 - 438
The complexity of checking identities for finite matrix rings Csaba SzabóVera Vértesi Mailbox Pages: 439 - 445