@article{DAN_1980_252_2_a1,
     author = {M. A. Akivis},
     title = {Webs and {almost-Grassmannian} structures},
     journal = {Doklady Akademii Nauk},
     pages = {267--270},
     publisher = {mathdoc},
     volume = {252},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_252_2_a1/}
}