%0 Journal Article %A N. R. Sibgatullin %T Lie–Bäcklund groups of certain model equations of continuum mechanics and classical fields %J Doklady Akademii Nauk %D 1986 %P 302-305 %V 291 %N 2 %U http://geodesic.mathdoc.fr/item/DAN_1986_291_2_a10/ %G ru %F DAN_1986_291_2_a10