@article{DAN_1986_288_4_a11,
     author = {F. O. Porper and S. D. \`Eidel'man},
     title = {Properties of weak fundamental solutions of parabolic equations with lower-order derivatives},
     journal = {Doklady Akademii Nauk},
     pages = {827--831},
     publisher = {mathdoc},
     volume = {288},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_288_4_a11/}
}