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@article{MAN_1974__210_162626, author = {John J. O'Sullivan}, title = {Manifolds without {Conjugate} {Points.}}, journal = {Mathematische Annalen}, pages = {295--312}, publisher = {mathdoc}, volume = {210}, year = {1974}, url = {http://geodesic.mathdoc.fr/item/MAN_1974__210_162626/} }
John J. O'Sullivan. Manifolds without Conjugate Points.. Mathematische Annalen, Tome 210 (1974), pp. 295-312. http://geodesic.mathdoc.fr/item/MAN_1974__210_162626/