9. Sound Propagation in a Channel with Lossy Boundaries, by HP Bucker; J Acoust Soc 

 Am, vol 48, p 1 187-1 194, November 1970. 



10. The Connection Between Nonnal Modes and Rays in Underwater Acoustics, by KM 



Guthrie; J of Sound and Vibration, vol 32 no 2, p 289-293, 1974. 



1 1 . Tables of the Modified Hankel Functions of Order One-Third and their Derivatives, 



Harvard University Computation Laboratory; Harvard University Press, Cambridge 

 MA, 1945. 



12. The Application of Continued Fractions and their Generahzations to Problems of Ap- 



proximate Analysis, by AN Khovanskii; a monograph in Russian, 1956. 



13. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical 



Tables, ed by M Abramowitz and I A Stegun; National Bureau of Standards Applied 

 Mathematics Series, vol 55, p 19, 1964. 



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