@article{MZM_1967_2_6_a6,
     author = {M. S. Agranovich and V. V. Sukhorutchenko},
     title = {The necessity of the algebraic parabolicity conditions of nonstationary problems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {615--625},
     publisher = {mathdoc},
     volume = {2},
     number = {6},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_6_a6/}
}