@article{TMF_1975_24_3_a10,
     author = {A. A. Atanasov},
     title = {Approximate solution of variable phase equation in the case of scattering on singular potentials},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {400--405},
     publisher = {mathdoc},
     volume = {24},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_24_3_a10/}
}