@article{DAN_1957_114_3_a20,
     author = {K. I. Rozgachev and V. A. Fabrikant},
     title = {Stepped excitation of atoms},
     journal = {Doklady Akademii Nauk},
     pages = {528--529},
     publisher = {mathdoc},
     volume = {114},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_3_a20/}
}