TY - JOUR AU - V. A. Andreev TI - B\"acklund transformations of~the Bullough--Dodd--Zhiber--Shabat equation and symmetries of~integrable equations JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1989 SP - 151 EP - 154 VL - 79 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1989_79_1_a14/ LA - ru ID - TMF_1989_79_1_a14 ER -