@article{SM_1981_40_3_a1,
     author = {M. A. Evgrafov},
     title = {Estimates of the fundamental solution of a~parabolic equation},
     journal = {Sbornik. Mathematics},
     pages = {305--324},
     publisher = {mathdoc},
     volume = {40},
     number = {3},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1981_40_3_a1/}
}