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@article{DAN_1964_158_6_a1, author = {M. I. Gorbunova}, title = {Horispheres in certain {Grassmann} manifolds}, journal = {Doklady Akademii Nauk}, pages = {1250--1253}, publisher = {mathdoc}, volume = {158}, number = {6}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_158_6_a1/} }
M. I. Gorbunova. Horispheres in certain Grassmann manifolds. Doklady Akademii Nauk, Tome 158 (1964) no. 6, pp. 1250-1253. http://geodesic.mathdoc.fr/item/DAN_1964_158_6_a1/