@article{IVM_1998_3_a8,
     author = {M. A. Cheshkova},
     title = {On a~property of orthogonal surfaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {63--64},
     publisher = {mathdoc},
     number = {3},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1998_3_a8/}
}