J. A. b. Schouten

Pfaff's Problem and Its Generalizations

J. A. Schouten, J. A. b. Schouten, W. van der Kulk, 1969 .

Ricci-Calculus: An Introduction to Tensor Analysis and Its Geometrical Applications

J. A. Schouten, J. A. b. Schouten, 1954 .