[MathOuvrage]
Symmetries and conservation laws for differential equations of mathematical physics
/ Bocharov, A. V. ; Chetverikov, V. N. ; Duzhin, S. V. ; Khor'kova, N. G. ; Ed. Krasil'shchik, Joseph ; Samokhin, A. V. ; Torkhov, Yu. N. ; Verbovetsky, A. M. ; Ed. Vinogradov, Alexandre M..
-Providence Ri : American mathematical Society, 1999. - xiv, 333 p. ; 26 cm