The axiomatic rank of the quasivariety of orderable groups is infinite. Bludov, V.V. — 2002 Sibirskij Matematicheskij Zhurnal
On ordering the groups with nilpotent commutant. Bludov, V.V.; Lapshina, E.S. — 2003 Sibirskij Matematicheskij Zhurnal
On metabelian groups with derived quotient an elementary Abelian 2-group of rank 3. Bludov, V.V.; Dolbak, L.V. — 2007 Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]