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@article{DAN_1970_191_3_a9, author = {V. A. Toponogov}, title = {Theorems on minimizing paths in noncompact {Riemannian} spaces of positive curvature}, journal = {Doklady Akademii Nauk}, pages = {537--539}, publisher = {mathdoc}, volume = {191}, number = {3}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_3_a9/} }
V. A. Toponogov. Theorems on minimizing paths in noncompact Riemannian spaces of positive curvature. Doklady Akademii Nauk, Tome 191 (1970) no. 3, pp. 537-539. http://geodesic.mathdoc.fr/item/DAN_1970_191_3_a9/