@article{IVM_1988_9_a4,
     author = {L. V. Zilbergleǐt},
     title = {Topological invariants of geometric singularities of solutions of {Monge{\textendash}Amp\'ere} equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {30--37},
     year = {1988},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1988_9_a4/}
}