Geodesic
Real finite-gap solutions of the equation $\Delta u=\ch u$
Matematičeskie zametki, Tome 50 (1991) no. 1, pp. 3-9 
M. V. Babich. Real finite-gap solutions of the equation $\Delta u=\ch u$. Matematičeskie zametki, Tome 50 (1991) no. 1, pp. 3-9. http://geodesic.mathdoc.fr/item/MZM_1991_50_1_a0/
@article{MZM_1991_50_1_a0,
     author = {M. V. Babich},
     title = {Real finite-gap solutions of the equation $\Delta u=\ch u$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {3--9},
     year = {1991},
     volume = {50},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_1_a0/}
}
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