@article{DAN_1991_318_6_a4,
     author = {V. P. Il'in},
     title = {Incomplete factorization methods for solving parabolic equations},
     journal = {Doklady Akademii Nauk},
     pages = {1304--1308},
     publisher = {mathdoc},
     volume = {318},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_6_a4/}
}