@article{DE_2005_41_4_a7,
     author = {V. K. Andreev and I. I. Ryzhkov},
     title = {Symmetry {Classification} and {Exact} {Solutions} of the {Thermal} {Diffusion} {Equations}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {508--517},
     publisher = {mathdoc},
     volume = {41},
     number = {4},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_4_a7/}
}