Stichting Mathematisch Centrum
Stichting Mathematisch Centrum. Toegepaste Wiskunde

Hofsommer, D. J. (1957). Note on the computation of the zeros of functions satisfying a second order differential equation : (Mathematical tables and other aids to computation, 12(1958), nr 61, p 58-60). Stichting Mathematisch Centrum. Toegepaste Wiskunde. Stichting Mathematisch Centrum.