@article{TRSPY_1976_140_a9,
     author = {I. A. Kipriyanov and A. A. Aziev},
     title = {The local solvability of certain singular partial differential equations},
     journal = {Informatics and Automation},
     pages = {181--190},
     publisher = {mathdoc},
     volume = {140},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1976_140_a9/}
}