1. Bailey M.E., Stagg, C.R.: 1990,Icarus 86, 2?8.
2. Callendreau, O.: 1892,Ann. Obs. Paris Mem. 20, B 1.
3. Carusi, A., Perozzi, E., Pittich, E.M., Valsecchi, G.B.: 1985, inDynamics of Comets: Their Origin and Evolution, IAU Coll.83, pp. 227?235.
4. Chirikov B.V., Vecheslavov V.V.: 1986,Astron. Astrophys. 221, 146?154.
5. Cox, L.P., Lewis, S.J., Lecar, M.: 1978,Icarus 34, 415?427.