@article{DAN_1962_147_4_a5,
     author = {A. M. Il'in},
     title = {On the fundamental solution of a parabolic equation},
     journal = {Doklady Akademii Nauk},
     pages = {768--771},
     publisher = {mathdoc},
     volume = {147},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_4_a5/}
}