Janet, Maurice Sur le problème de Pfaff. (French) Zbl 0024.20103 J. Math. Pures Appl., IX. Sér. 19, 307-318 (1940). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:Differential geometry, general geometry PDFBibTeX XMLCite \textit{M. Janet}, J. Math. Pures Appl. (9) 19, 307--318 (1940; Zbl 0024.20103)