%0 Journal Article %A A. M. Ilyasov %T Optimal system of Lie algebra subalgebras of the point symmetries group for nonlinear heat equation without source %J Ufa mathematical journal %D 2013 %P 53-66 %V 5 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UFA_2013_5_3_a5/ %G en %F UFA_2013_5_3_a5