Roşca, Radu Sur les variétés pseudo-isotropes, immergées dans une variété lorentzienne. (Pseudo-isotropic manifolds immersed in a Lorentz manifold). (French) Zbl 0222.53058 Rev. Roum. Math. Pures Appl. 15, 1519-1526 (1970). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Review MSC: 53C50 Global differential geometry of Lorentz manifolds, manifolds with indefinite metrics 53C42 Differential geometry of immersions (minimal, prescribed curvature, tight, etc.) PDFBibTeX XMLCite \textit{R. Roşca}, Rev. Roum. Math. Pures Appl. 15, 1519--1526 (1970; Zbl 0222.53058)