Geodesic
Solution of variable phase equation with singular potentials by means of formal series
Teoretičeskaâ i matematičeskaâ fizika, Tome 28 (1976) no. 2, pp. 232-239 
A. A. Atanasov. Solution of variable phase equation with singular potentials by means of formal series. Teoretičeskaâ i matematičeskaâ fizika, Tome 28 (1976) no. 2, pp. 232-239. http://geodesic.mathdoc.fr/item/TMF_1976_28_2_a8/
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     author = {A. A. Atanasov},
     title = {Solution of variable phase equation with singular potentials by means of formal series},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {232--239},
     year = {1976},
     volume = {28},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1976_28_2_a8/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

The method of formal series is applied to the solution of a variable phase equation with singular potentials. The limiting cases of scattering at high and low energies and the problem of resonances with a singular potential at a finite point are considered.

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