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@article{DAN_1968_179_6_a5, author = {E. M. Landis}, title = {Harnack's inequality for second order elliptic equations of {Cordes} type}, journal = {Doklady Akademii Nauk}, pages = {1272--1275}, publisher = {mathdoc}, volume = {179}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_6_a5/} }
E. M. Landis. Harnack's inequality for second order elliptic equations of Cordes type. Doklady Akademii Nauk, Tome 179 (1968) no. 6, pp. 1272-1275. http://geodesic.mathdoc.fr/item/DAN_1968_179_6_a5/