@article{DAN_1987_297_5_a3,
     author = {V. Ya. Ivrii},
     title = {Estimates for the number of negative eigenvalues of the {Schr\"odinger} operator with a strong magnetic field},
     journal = {Doklady Akademii Nauk},
     pages = {1043--1046},
     publisher = {mathdoc},
     volume = {297},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_5_a3/}
}