@article{TMF_2000_124_1_a9,
     author = {O. N. Gadomsky and T. T. Idiatullov},
     title = {Parapositronium atom in the field of annihilation and optical photons as a nonlinear quantum system},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {148--168},
     year = {2000},
     volume = {124},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_124_1_a9/}
}