1. Antonov, V. A. and Latyshev, I. N.: 1972, in G. A. Chebotarev, E. I. Kazimirchak-Polonskaya, and B. G. Marsden (eds), ?The Motion, Evolution of Orbits, and Origin of Comets?,IAU Symp. 45, 341.
2. Chebotarev, G. A.: 1963,Sov. Astron. 7, 618.
3. Chebotarev, G. A.: 1964,Sov. Astron. 8, 787.
4. Chebotarev, G. A.: 1966,Sov. Astron. 10, 341.
5. Chebotarev, G. A.: 1972, in G. A. Chebotarev, E. I. Kazimirchak-Polonskaya, and B. G. Marsden (eds), ?The Motion, Evolution of Orbits, and Origin of Comets?,IAU Symp. 45, 1.