@article{03680301,
title = {Closed form bound-state perturbation theory.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {3},
year = {1980},
pages = {351-368},
doi = {10.1155/S0161171280000245},
zbl = {0436.35008},
language = {en},
url = {http://dml.mathdoc.fr/item/03680301}
}
Rose, Ollie J.; Adler, Carl G. Closed form bound-state perturbation theory.. International Journal of Mathematics and Mathematical Sciences, Tome 3 (1980) pp. 351-368. doi : 10.1155/S0161171280000245. http://gdmltest.u-ga.fr/item/03680301/