Stichting Mathematisch Centrum
Stichting Mathematisch Centrum. Zuivere Wiskunde

Schouten, J. A. (1950). Regular systems of equations and supernumerary coordinates : a course of twelve lectures delivered in 1947 at the Mathematical Centre of Amsterdam. Stichting Mathematisch Centrum. Zuivere Wiskunde. Stichting Mathematisch Centrum.