@article{TMF_1990_85_1_a8,
     author = {N. U. Nazarov and O. A. Ponomarev},
     title = {Quantum dynamics of~transitions in~two-level electron{\textendash}phonon systems with strong interactions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {89--101},
     year = {1990},
     volume = {85},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_85_1_a8/}
}