@article{01455550,
title = {Double and triple summation expressions obtained using perturbation theory.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {23},
year = {2000},
pages = {289-295},
doi = {10.1155/S0161171200000466},
zbl = {0989.81027},
language = {en},
url = {http://dml.mathdoc.fr/item/01455550}
}
Mavromatis, Harry A. Double and triple summation expressions obtained using perturbation theory.. International Journal of Mathematics and Mathematical Sciences, Tome 23 (2000) pp. 289-295. doi : 10.1155/S0161171200000466. http://gdmltest.u-ga.fr/item/01455550/