@article{TMF_1970_5_1_a8,
     author = {A. A. Arsen'ev},
     title = {Estimate of the energy width of a~quasistationary level},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {94--97},
     year = {1970},
     volume = {5},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1970_5_1_a8/}
}