@article{DAN_1960_130_3_a0,
     author = {M. B. Kapilevich},
     title = {Transformation operators connected with {Goursat} singular problems},
     journal = {Doklady Akademii Nauk},
     pages = {487--490},
     publisher = {mathdoc},
     volume = {130},
     number = {3},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_130_3_a0/}
}