%0 Journal Article %A O. N. Gadomsky %A T. T. Idiatullov %T Parapositronium atom in the field of annihilation and optical photons as a nonlinear quantum system %J Teoretičeskaâ i matematičeskaâ fizika %D 2000 %P 148-168 %V 124 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2000_124_1_a9/ %G ru %F TMF_2000_124_1_a9