Asymptotic solutions of Whittaker's differential equation as the moduli of the independent variable and two parameters tend to infinity

Reduction of the order of a linear ordinary differential equation containing a small parameter

1963 • 41 citations

Asymptotic forms of Whittaker’s confluent hypergeometric functions

1957 • 20 citations

Asymptotic solutions of a system of linear ordinary differential equations containing a small parameter,1.

1963 • 15 citations

Über eine erweiterte asymptotische Darstellung der Lösung eines Systems von linearen homogenen Differentialgleichungen, welche von zwei Parametern abhängen

1958 • 3 citations