@article{RM_1960_15_6_a9,
     author = {U. Khou-sin'},
     title = {On the definition of parabolic systems of partial differential equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {15},
     number = {6},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1960_15_6_a9/}
}