Multidimensional exact solutions to a quasilinear parabolic equation with anisotropic heat conductivity. Semenov, E.I. — 2006 Sibirskij Matematicheskij Zhurnal
New exact solutions to the nonautonomous Liouville equation. Semenov, È.I. — 2008 Sibirskij Matematicheskij Zhurnal