@article{DAN_1995_345_1_a5,
     author = {G. A. Sviridyuk and T. G. Sukacheva and L. L. Dudko},
     title = {Necessary and sufficient conditions for the relative},
     journal = {Doklady Akademii Nauk},
     pages = {25--27},
     publisher = {mathdoc},
     volume = {345},
     number = {1},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_345_1_a5/}
}