@article{DE_1991_27_8_a20,
     author = {V. F. Volkodavov and O. K. Bystrova},
     title = {Construction of {Riemann--Hadamard} functions for a degenerate equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1444--1446},
     publisher = {mathdoc},
     volume = {27},
     number = {8},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_8_a20/}
}