@article{TMF_1974_20_2_a13,
     author = {L. N. Ivanov and E. P. Ivanova},
     title = {First-order function for semirelativistic atomic equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {282--287},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_20_2_a13/}
}