@article{DE_1995_31_2_a15,
     author = {S. I. Pokhozhaev},
     title = {On the {Maslov} equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {338--349},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_2_a15/}
}