Grigor’eva, N. S. Asymptotische Darstellungen modifizierter Wellenfunktionen eines abgeplatteten Sphäroids. (Russian) Zbl 0402.34046 Zh. Vychisl. Mat. Mat. Fiz. 19, 156-169 (1979). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Review MSC: 34E20 Singular perturbations, turning point theory, WKB methods for ordinary differential equations 33E10 Lamé, Mathieu, and spheroidal wave functions 41A60 Asymptotic approximations, asymptotic expansions (steepest descent, etc.) PDF BibTeX XML Cite \textit{N. S. Grigor'eva}, Zh. Vychisl. Mat. Mat. Fiz. 19, 156--169 (1979; Zbl 0402.34046)