@article{TMF_1983_56_3_a6,
     author = {E. K. Bashkirov and N. N. Bogolyubov (Jr.) and A. S. Shumovskii},
     title = {Estimate of the conversion time in macroscopic two-level systems},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {395--404},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1983_56_3_a6/}
}