@article{AIHP_1956__15_2_67_0,
     author = {Heitler, W.},
     title = {Le principe du bilan d\'etaill\'e},
     journal = {Annales de l'institut Henri Poincar\'e},
     pages = {67--80},
     publisher = {INSTITUT HENRI POINCAR\'E ET GAUTHIER-VILLARS},
     volume = {15},
     number = {2},
     year = {1956},
     mrnumber = {85886},
     zbl = {0072.43004},
     language = {fr},
     url = {http://www.numdam.org/item/AIHP_1956__15_2_67_0/}
}