@article{MZM_2001_70_5_a6,
     author = {V. V. Konnov},
     title = {Cotangent {Bundle} over {Projective} {Space} and the {Manifold} of {Nondegenerate} {Null-Pairs}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {718--735},
     publisher = {mathdoc},
     volume = {70},
     number = {5},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_70_5_a6/}
}