@article{DAN_1996_346_1_a7,
     author = {B. P. Rysev},
     title = {On a criterion for integrability by the method of the inverse},
     journal = {Doklady Akademii Nauk},
     pages = {28--30},
     publisher = {mathdoc},
     volume = {346},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_346_1_a7/}
}