К теории многообразий решеточно упорядоченных групп N.Ya. Medvedev — 1982 Czechoslovak Mathematical Journal
О решётке o -аппроксимируемых ℓ -многообразий N.Ya. Medvedev — 1984 Czechoslovak Mathematical Journal
Independent axiomatization of varieties of lattice ordered groups N.Ya. Medvedev — 1992 Czechoslovak Mathematical Journal
On covers in the lattice of representable ℓ -varieties N.Ya. Medvedev; S. V. Morozova — 1998 Czechoslovak Mathematical Journal
Coverings in the lattice of quasivarieties of ℓ -groups. Isaeva, O.V.; Medvedev, N.Ya. — 2000 Siberian Mathematical Journal