Programmnye sredstva mnogourovnevoĭ sistemy upravleni︠i︡a bazami dannykh - Kogalovskiĭ, Mikhail Ruvimovich; Khrustalev, V. D. (Akademi︠i︡a nauk SSSR, ︠T︡Sentr. ėkonomiko-matematicheskiĭ in-t, 1983)