Geodesic
Bäcklund transformations of the Bullough–Dodd–Zhiber–Shabat equation and symmetries of integrable equations
Teoretičeskaâ i matematičeskaâ fizika, Tome 79 (1989) no. 1, pp. 151-154 
V. A. Andreev. Bäcklund transformations of the Bullough–Dodd–Zhiber–Shabat equation and symmetries of integrable equations. Teoretičeskaâ i matematičeskaâ fizika, Tome 79 (1989) no. 1, pp. 151-154. http://geodesic.mathdoc.fr/item/TMF_1989_79_1_a14/
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     author = {V. A. Andreev},
     title = {B\"acklund transformations of~the {Bullough{\textendash}Dodd{\textendash}Zhiber{\textendash}Shabat} equation and symmetries of~integrable equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     url = {http://geodesic.mathdoc.fr/item/TMF_1989_79_1_a14/}
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Bäcklund transformations are constructed for the Bullof–Dodd–Giber–Shabat equation. Connection between the symmetries corresponding to the Bäcklund transformations and the reductions of integrable equations is investigated.

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