@article{DE_1991_27_5_a20,
     author = {B. A. Volodin and A. M. Khapaev},
     title = {On a method for constructing a solution of a relativistic wave equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {898--901},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a20/}
}