@article{IVM_1976_11_a4,
     author = {E. T. Ivlev and \`E. M. Kondakova and G. G. Pustynnikov},
     title = {A projectively invariant class of manifolds of nondegenerate null pairs in multidimensional projective space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {38--47},
     publisher = {mathdoc},
     number = {11},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1976_11_a4/}
}