Geodesic
Variable phase method for scattering on nonlocal potentials that admit separation of the variables in spheroidal coordinates
Teoretičeskaâ i matematičeskaâ fizika, Tome 38 (1979) no. 3, pp. 370-379

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An expression is obtained for amplitudes of scattering on nonlocal spheroidal potentials which contains partial-wave amplitudes. In accordance with the variable phase method, equations are obtained for the amplitude functions. The partial-wave amplitudes are determined in the cases when separable potential functions participate in the expansion of the kernel of the potential with respect to the angular functions. 
@article{TMF_1979_38_3_a8,
     author = {K. I. Ivanov and A. T. Marinov},
     title = {Variable phase method for scattering on nonlocal potentials that admit separation of the variables in spheroidal coordinates},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {370--379},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1979_38_3_a8/}
}
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K. I. Ivanov; A. T. Marinov. Variable phase method for scattering on nonlocal potentials that admit separation of the variables in spheroidal coordinates. Teoretičeskaâ i matematičeskaâ fizika, Tome 38 (1979) no. 3, pp. 370-379. http://geodesic.mathdoc.fr/item/TMF_1979_38_3_a8/