Ogilvie, K.; Olde Daalhuis, A.B.
(Symmetry, Integrability and Geometry: Methods and Applications, 2015)
By application of the theory for second-order linear differential equations with two turning points developed in [Olver F.W.J., Philos. Trans. Roy. Soc. London Ser. A 278 (1975), 137-174], uniform asymptotic approximations ...