@article{TMF_1970_5_1_a14,
     author = {V. S. Butylkin and O. V. Kudrevatova},
     title = {Wave-function representation by means of a~system of nonorthogonal functions and allowance for the contribution of the discrete levels of a~single-particle system to the probability of its multiphoton ionization},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {154--158},
     year = {1970},
     volume = {5},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1970_5_1_a14/}
}