%0 Journal Article %A White, Gregory B. %T Splitting of the Dirac operator in the nonrelativistic limit %J Annales de l'I.H.P. Physique théorique %D 1990 %P 109-121 %V 53 %N 1 %I Gauthier-Villars %U http://archive.numdam.org/item/AIHPA_1990__53_1_109_0/ %G en %F AIHPA_1990__53_1_109_0