@article{AIHPA_1984__41_2_143_0,
     author = {Ruiz Ruiz, F. and Alvarez-Estrada, R. F.},
     title = {On the classical limit and the infrared problem for non-relativistic fermions interacting with the electromagnetic field},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {143--170},
     publisher = {Gauthier-Villars},
     volume = {41},
     number = {2},
     year = {1984},
     mrnumber = {769153},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1984__41_2_143_0/}
}