@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/