Rosca, R. Sur les hypersurfaces isotropes de défaut I incluses dans une variété lorentzienne. (French) Zbl 0206.51001 C. R. Acad. Sci., Paris, Sér. A 272, 393-396 (1971). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 5 Documents MSC: 53C50 Global differential geometry of Lorentz manifolds, manifolds with indefinite metrics 53C40 Global submanifolds PDFBibTeX XMLCite \textit{R. Rosca}, C. R. Acad. Sci., Paris, Sér. A 272, 393--396 (1971; Zbl 0206.51001)