@article{DAN_1972_203_2_a3,
     author = {A. K. Gushchin},
     title = {On lower bounds for the solutions of boundary value problems for a parabolic equation},
     journal = {Doklady Akademii Nauk},
     pages = {274--277},
     publisher = {mathdoc},
     volume = {203},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_203_2_a3/}
}