@article{ZVMMF_2017_57_6_a4,
     author = {A. I. Kozhanov},
     title = {Parabolic equations with unknown time-dependent coefficients},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {961--972},
     publisher = {mathdoc},
     volume = {57},
     number = {6},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2017_57_6_a4/}
}