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@article{JRAM_1986__368_152839, author = {Ziv Ran}, title = {Surfaces of order 1 in {Grassmannians.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {119--126}, publisher = {mathdoc}, volume = {368}, year = {1986}, zbl = {0601.14042}, url = {http://geodesic.mathdoc.fr/item/JRAM_1986__368_152839/} }
Ziv Ran. Surfaces of order 1 in Grassmannians.. Journal für die reine und angewandte Mathematik, Tome 368 (1986), pp. 119-126. http://geodesic.mathdoc.fr/item/JRAM_1986__368_152839/