@article{DAN_1976_229_1_a1,
     author = {B. A. Dubrovin and I. M. Krichever and S. P. Novikov},
     title = {The {Schr\"odinger} equation in a periodic field and {Riemann} surfaces},
     journal = {Doklady Akademii Nauk},
     pages = {15--18},
     publisher = {mathdoc},
     volume = {229},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_229_1_a1/}
}