1. M. Abramowitz, andI. A. Stegun (Editors),Handbook of Mathematical Functions (Dover Publications, Inc., New York, 1965).
2. L. E. Alsop, Jr., Geophys. Res.71 (1966), 3969?84.
3. D. M. Boore, Jr., Geophys. Res.75 (1970), 1512.
4. K. E. Bullen,An Introduction to the Theory of Seismology, (Third Edition, Cambridge, At the University Press, 1963).
5. Noyer De, Bull. Seis. Soc. Amer.51 (1961), 227?35.