@article{GDZPPN002053772, title = {L'it\'eration directe des op\'erateurs hermitiens.}, journal = {Commentarii mathematici Helvetici}, volume = {16}, year = {1943}, pages = {65-72}, zbl = {0028.23402}, url = {http://dml.mathdoc.fr/item/GDZPPN002053772} }
Wavre, R. L'itération directe des opérateurs hermitiens.. Commentarii mathematici Helvetici, Tome 16 (1943) pp. 65-72. http://gdmltest.u-ga.fr/item/GDZPPN002053772/