1. Astapovich, I.S.. 1973, Astronomicheskij kalendar (Perm, vol.), p. 579.
2. Babadzhanov, P.B. and Obrubov, Yu.V. 1983, Asteroids, Comets, Meteors, ed. C.-I. Lagerkvist and H. Rickman, Reprocentralen HSC, Uppsala, p. 411.
3. Babadzhanov, P.B. and Obrubov Yu.V. 1987, in Interplanetary Matter, ed. Z. Ceplecha and P. Pecina, Publ. Astron. Inst. Czecho-Sl. Acad.Sci., 2, Praha, p. 141.
4. Babadzhanov, P.B. and Obrubov, Yu.V. 1989, in Highlights of Astronomy, ed. R. West, p. 287.
5. Babadzhanov, P.B. and Obrubov, Yu.V. 1992, Celest. Mech. Dyn. Astron. 54, 111.