@article{AA_1997_9_6_a4,
     author = {N. M. Ivochkina and O. A. Ladyzhenskaya},
     title = {Estimates for first-order derivatives for solutions of some classes of non-totally parabolic equations},
     journal = {Algebra i analiz},
     pages = {109--131},
     publisher = {mathdoc},
     volume = {9},
     number = {6},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1997_9_6_a4/}
}