@article{DAN_1961_141_1_a17,
     author = {I. M. Chapnik},
     title = {A possible criterion of superconductivity},
     journal = {Doklady Akademii Nauk},
     pages = {70--73},
     publisher = {mathdoc},
     volume = {141},
     number = {1},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_1_a17/}
}