@article{DAN_1979_248_1_a10,
     author = {M. M. Skriganov},
     title = {Proof of the {Bethe--Sommerfeld} conjecture in dimension two},
     journal = {Doklady Akademii Nauk},
     pages = {39--42},
     publisher = {mathdoc},
     volume = {248},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_248_1_a10/}
}