フランク・オルバー
Olver, F. W. (1954). The asymptotic expansion of Bessel functions of large order. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 247(930), 328-368.
Olver, F. W. (1954). The asymptotic solution of linear differential equations of the second order for large values of a parameter. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 247(930), 307-327.
Olver, F. W. J. (1961, October). Error bounds for the Liouville–Green (or WKB) approximation. In Mathematical Proceedings of the Cambridge Philosophical Society (Vol. 57, No. 4, pp. 790-810). en:Cambridge University Press.
Olver, F. W. (1975).