Geodesic
Finite-gap solutions of~the Bullough--Dodd--Zhiber--Shabat equation
Teoretičeskaâ i matematičeskaâ fizika, Tome 82 (1990) no. 1, pp. 155-160

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Explicit expressions in terms of Prym theta functions are obtained for finite-gap solutions of the Bullough–Dodd–Zhiber–Shabat equation, and conditions that ensure reality and nonsingularity of these finite-gap solutions are established. 
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     author = {I. Yu. Cherdantsev and R. A. Sharipov},
     title = {Finite-gap solutions of~the {Bullough--Dodd--Zhiber--Shabat} equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     url = {http://geodesic.mathdoc.fr/item/TMF_1990_82_1_a15/}
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I. Yu. Cherdantsev; R. A. Sharipov. Finite-gap solutions of~the Bullough--Dodd--Zhiber--Shabat equation. Teoretičeskaâ i matematičeskaâ fizika, Tome 82 (1990) no. 1, pp. 155-160. http://geodesic.mathdoc.fr/item/TMF_1990_82_1_a15/