Tekhnika realiza︠t︡sii mnogourovnevykh sistem upravleni︠i︡a bazami dannykh - Kleandrov, D. I.; Kogutovskiĭ, Valeriĭ Vasilʹevich; Kogalovskiĭ, Mikhail Ruvimovich (Akademi︠i︡a nauk SSSR, ︠T︡Sentr. ėkonomiko-matematicheskiĭ in-t, 1982)