@article{DE_1990_26_7_a7,
     author = {E. I. Moiseev},
     title = {Application of the method of the separation of variables for solving equations of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1160--1172},
     publisher = {mathdoc},
     volume = {26},
     number = {7},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_7_a7/}
}