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@article{CHFMJ_2019_4_4_a4, author = {R. K. Salimov and E. G. Ekomasov and A. M. Gumerov}, title = {On nonstationary}, journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal}, pages = {419--426}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {2019}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/CHFMJ_2019_4_4_a4/} }
R. K. Salimov; E. G. Ekomasov; A. M. Gumerov. On nonstationary. Čelâbinskij fiziko-matematičeskij žurnal, Tome 4 (2019) no. 4, pp. 419-426. http://geodesic.mathdoc.fr/item/CHFMJ_2019_4_4_a4/