@article{DE_1996_32_8_a4, author = {B. S. Kalitin}, title = {Pseudoprolongation}, journal = {Differencialʹnye uravneni\^a}, pages = {1043--1050}, publisher = {mathdoc}, volume = {32}, number = {8}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1996_32_8_a4/} }