%0 Journal Article %A V. A. Andreev %T Bäcklund transformations of the Bullough–Dodd–Zhiber–Shabat equation and symmetries of integrable equations %J Teoretičeskaâ i matematičeskaâ fizika %D 1989 %P 151-154 %V 79 %N 1 %U http://geodesic.mathdoc.fr/item/TMF_1989_79_1_a14/ %G ru %F TMF_1989_79_1_a14