1. Bhatnagar, K.B. and Hallan, P.P.: 1978,Celest. Mech. 18, 105.
2. Ishwar, B and Srivastava, A.K.: 1980, ?Restricted Problem of Three Bodies with Variable Mass?, Ph.D. Thesis.
3. Ishwar, B. and Singh, J.: 1983,Celest. Mech. 32, 297.
4. Jeans, J.H.: 1928,Astronomy and Cosmogonoy, Cambridge.
5. Meshcherskii, I.V.: 1949,On the Mechanics of Bodies of Variable Mass, (In Russian), Moscow, Leningrad.