1. Cameron, A. G. W.: 1978,The Moon and the Planets 18, 5.
2. DeCampli, W. M. and Cameron, A. G. W.: 1979,Icarus (in press).
3. Hazelhurst, J. and Refsdal, S.: 1978,Astron. Astrophys. 62, L9.
4. Lin, D. N. C. and Pringle, J. E.: 1976, in Eggleton, P. P., Mitton, S., and Whelan, J. A. J. (eds.),Structure and Evolution of Binary Systems, D. Reidel Pub. Co., Dordrecht, Holland.
5. Lin, D. N. C. and Papaloizou, J.: 1979, Tidal Torques on Accretion Disks in Binary Systems With Extreme Mass Ratios (preprint).