@article{IVM_1991_6_a1,
     author = {S. V. Vedernikov},
     title = {Invariant conditions generated by global pairs},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {12--17},
     year = {1991},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_6_a1/}
}