@article{DAN_1962_147_4_a21,
     author = {E. D. Trifonov},
     title = {Probability of a phononless transition in impurity centres of crystals},
     journal = {Doklady Akademii Nauk},
     pages = {826--828},
     publisher = {mathdoc},
     volume = {147},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_4_a21/}
}