E. E.  Perkovsky, ?Three new species and new subspecies of the genus Agathidium from the Soviet Far East, Yakutia and Caucasus?, VTkz, pp. 81-85. (en Russe), 1991.

E. E.  Perkovsky, ?On the contents of the tribe Sogdiini and systematic position of the genus Deltocnemis (Coleoptera, Leiodidae)?, VTkz, pp. 17-21. (en Russe), 1991.