Stichting Mathematisch Centrum
Stichting Mathematisch Centrum. Zuivere Wiskunde

van de Lune, J.& Wattel, E. (1969). On the numerical solution of a differential-difference equation arising in analytic number theory. In Stichting Mathematisch Centrum. Zuivere Wiskunde (ZW 18/69/R). Stichting Mathematisch Centrum.