Godbillon, C.; Vey, J. Un invariant des feuilletages de codimension 1. (French) Zbl 0215.24604 C. R. Acad. Sci., Paris, Sér. A 273, 92-95 (1971). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 8 ReviewsCited in 74 Documents MSC: 57R30 Foliations in differential topology; geometric theory PDFBibTeX XMLCite \textit{C. Godbillon} and \textit{J. Vey}, C. R. Acad. Sci., Paris, Sér. A 273, 92--95 (1971; Zbl 0215.24604)