@article{IVM_1983_5_a10,
     author = {L. L. Beskorovainaya},
     title = {Infinitesimal areal deformations of oval surfaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--71},
     year = {1983},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1983_5_a10/}
}