@article{SM_2006_197_12_a3,
     author = {V. V. Zhikov},
     title = {Estimates of the {Nash--Aronson} type for the diffusion equation with non-symmetric matrix and 
},
     journal = {Sbornik. Mathematics},
     pages = {1775--1804},
     publisher = {mathdoc},
     volume = {197},
     number = {12},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2006_197_12_a3/}
}