@article{RM_1984_39_3_a2,
     author = {F. O. Porper and S. D. \`Eidel'man},
     title = {Two-sided estimates of fundamental solutions of second-order parabolic equations, and some applications},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {119--178},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1984_39_3_a2/}
}