Stichting Mathematisch Centrum
Stichting Mathematisch Centrum. Toegepaste Wiskunde

Grasman, J. (1973). The birth of a boundary layer in an elliptic singular perturbation problem : (proceedings conference in spectral theory and asymptotics of differential equations, ed. E.M. deJager, (1974), p 175-179). In Stichting Mathematisch Centrum. Toegepaste Wiskunde (TW 138/73/R). Stichting Mathematisch Centrum.