@article{AIHPA_1973__19_4_341_0,
     author = {Raczka, R.},
     title = {A theory of relativistic unstable particles},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {341--356},
     publisher = {Gauthier-Villars},
     volume = {19},
     number = {4},
     year = {1973},
     mrnumber = {349165},
     zbl = {0288.22026},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1973__19_4_341_0/}
}