@article{IVM_1988_12_a12,
     author = {E. T. Ivlev and I. A. Grishina},
     title = {On the fibration of a~family of projective nondegenerate null-pairs},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {67--71},
     publisher = {mathdoc},
     number = {12},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1988_12_a12/}
}