%0 Journal Article %A Ruiz Ruiz, F. %A Alvarez-Estrada, R. F. %T On the classical limit and the infrared problem for non-relativistic fermions interacting with the electromagnetic field %J Annales de l'I.H.P. Physique théorique %D 1984 %P 143-170 %V 41 %N 2 %I Gauthier-Villars %U http://archive.numdam.org/item/AIHPA_1984__41_2_143_0/ %G en %F AIHPA_1984__41_2_143_0