@article{IVM_1988_2_a4,
     author = {L. B. Zelenko},
     title = {Locally selfadjoint extensions of nonlinear operators, and {Lagrangian} {manifolds.~I}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {22--31},
     publisher = {mathdoc},
     number = {2},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1988_2_a4/}
}