@article{DE_1990_26_2_a13,
     author = {K. B. Sabitov},
     title = {Extremal properties of solutions of a class of parabolic systems and their applications},
     journal = {Differencialʹnye uravneni\^a},
     pages = {287--297},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_2_a13/}
}