@article{IM2_1968_2_6_a0,
     author = {Yu. I. Manin},
     title = {Cubic hypersurfaces. {I.} {Quasigroups} of classes of points},
     journal = {Izvestiya. Mathematics},
     pages = {1171--1191},
     year = {1968},
     volume = {2},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1968_2_6_a0/}
}