Symmetries and conservation laws for differential equations of mathematical physics by Bočarov, A. V., Vinogradov, Aleksandr Michajlovič fromTranslations of mathematical monographs 0 Type: Book
Symmetries and conservation laws for differential equations of mathematical physics by Bočarov, A. V., Krasil'ščik, Iosif Semenovič fromTranslations of mathematical monographs 0 Type: Book