@article{IVM_1986_6_a0,
     author = {M. B. Vernikov},
     title = {Complete systems of invariants and frames in the set of {Lagrangian} subspaces of a~symplectic space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--7},
     year = {1986},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1986_6_a0/}
}