@article{DAN_1991_318_5_a10,
     author = {I. F. Lezhenina and P. E. Sobolevskii},
     title = {Estimation of solutions of a parabolic equation with a singular},
     journal = {Doklady Akademii Nauk},
     pages = {1072--1077},
     publisher = {mathdoc},
     volume = {318},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_5_a10/}
}