1. D. Harris, G. Engerholm, and W. Gwinn, J. Chem. Phys. 43, 1515 (1965).JCPSA60021-9606
2. D. Zetik and F. A. Matsen have performed similar calculations for rotating diatomic molecules [see Bull. Am. Phys. Soc. 12, 182 (1967)].BAPSA60003-0503
3. P. Endres and D. J. Wilson, J. Chem. Phys. 46, 426 (1967) Eq. (3).JCPSA60021-9606
4. W. E. Smyser, Doctoral dissertation, University of Rochester, 1967.