1. K. Kumar: in The Electromagnetic Interaction In Nuclear Spectroscopy (Ed. W.D. Hamilton), North-Holland, Amsterdam, 1975, Ch. III.
2. K. Kumar: Nuclear Models and The Search For Unity In Nuclear Physics, Universitetsforlaget, Bergen, 1984.
3. K. Kumar and J.B. Gupta: Nucl. Phys. A 694 (2001) 199.
4. J.B. Gupta and K. Kumar: Nucl. Phys. A, in press.
5. J. Lange, K. Kumar, and J.H. Hamilton: Rev. Mod. Phys. 54 (1982) 119.