フランク・オルバー
Second-order linear differential equations with two turning points. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 278(1279), 137-174.
Olver, F. W. (1956). The asymptotic solution of linear differential equations of the second order in a domain containing one transition point. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 249(959), 65-97.
Olver, F. W. (1958). Uniform asymptotic expansions of solutions of linear second-order differential equations for large values of a parameter. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 250(984), 479-517.
Olver, Frank W. J. (1997) [1974], Asymptotics and special functions, AKP Classics, Wellesley, MA: A K Peters Ltd., ISBN 978-1-56881-069-0, MR 1429619
Olver, Frank W. J. (2000), Selected papers of F. W. J. Olver. Part I, II, World Scientific Series in 20th Century Mathematics, 7, River Edge, NJ: World Scientific Publishing Co. Inc., ISBN 978-981-02-4106-3, MR 1759688
Olver, Frank W. J.; Lozier, Daniel W.; Boisvert, Ronald F.; et al., eds. (2010), NIST Handbook of Mathematical Functions, en:Cambridge University Press, ISBN 978-0-521-19225-5