1. Lecture notes on nilpotent groups;Baumslag,1971
2. On the Mal'cev correspondence between rings and groups;Belegradek,1989
3. The Mal'cev correspondence revisited;Belegradek,1992
4. Groups elementarily equivalent to UT3(R);Belegradek,1990
5. Quasiunitriangular groups;Belegradek;J. Symbolic Logic,1993