@article{IVM_1974_6_a9,
     author = {G. B. Khasin},
     title = {Three-parameter families of two-planes in projective four-space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {80--90},
     publisher = {mathdoc},
     number = {6},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1974_6_a9/}
}