@article{JMPA_1946_9_25__335_0,
     author = {Petiau, G\'erard},
     title = {Sur les relations tensorielles entre densit\'es de valeurs moyennes en th\'eorie de l'\'electron de {Dirac} {(I)}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {335--346},
     volume = {9e s{\'e}rie, 25},
     year = {1946},
     mrnumber = {24219},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1946_9_25__335_0/}
}