@Article{ gbegfugfg, author = { Bellettini, Giovanni and Fusco, Giorgio and Gronchi, Giovanni Federico }, title = { Regularization of the two-body problem via smoothing the potential }, journal = { Comm. Pure Appl. Anal. }, year = { 2003 }, volume = { 2 }, pages = { 323-353 }, URL = { http://cvgmt.sns.it/paper/37/ }, note = { cvgmt preprint} }