@article{DE_1992_28_8_a16,
     author = {A. K. Ratyni},
     title = {Conditions for well-posedness of the problem of determining the matrix of coefficients multiplying the highest derivatives of a parabolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1419--1426},
     publisher = {mathdoc},
     volume = {28},
     number = {8},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_8_a16/}
}