@article{CMH_1942__15_138813,
     author = {R. Wavre},
     title = {L'it\'eration directe des op\'erateurs hermitiens et deux th\'eories qui en d\'ependent.},
     journal = {Commentarii mathematici Helvetici},
     pages = {299--317},
     year = {1942},
     volume = {15},
     zbl = {0028.16502},
     url = {http://geodesic.mathdoc.fr/item/CMH_1942__15_138813/}
}