@article{ISU_2011_11_2_a9, author = {V. A. Kovalev and Yu. N. Radayev}, title = {An optimal system constructing algorithm for symmetry algebra of three-dimensional equations of the perfect plasticity}, journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics}, pages = {61--77}, publisher = {mathdoc}, volume = {11}, number = {2}, year = {2011}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/ISU_2011_11_2_a9/} }