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@article{CMH_1994__69_4_140335, author = {Takashi Shioya}, title = {Mass of rays in {Alexandrov} spaces of nonnegative curvature.}, journal = {Commentarii mathematici Helvetici}, pages = {208--228}, publisher = {mathdoc}, volume = {69}, number = {4}, year = {1994}, zbl = {0818.53080}, url = {http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140335/} }
Takashi Shioya. Mass of rays in Alexandrov spaces of nonnegative curvature.. Commentarii mathematici Helvetici, Tome 69 (1994) no. 4, pp. 208-228. http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140335/