@article{SM_1990_67_2_a13,
     author = {E. F. Lelikova},
     title = {On the asymptotics of the fundamental solution of a~parabolic equation in the critical case},
     journal = {Sbornik. Mathematics},
     pages = {581--594},
     publisher = {mathdoc},
     volume = {67},
     number = {2},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1990_67_2_a13/}
}