@article{TMF_1980_44_3_a15,
     author = {N. E. Nyun'ko and Yu. N. Tyukhtyaev and R. N. Faustov},
     title = {Construction of~the kernel of~the equation for the total {Green's} function of~positronium},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {424--430},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1980_44_3_a15/}
}