@article{BSMF_1973__101__219_0,
     author = {Long, Ton-That},
     title = {Contributions \`a l'\'etude spectrale des contractions de l'espace de {Hilbert}},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {219--235},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {101},
     year = {1973},
     doi = {10.24033/bsmf.1758},
     zbl = {0267.47002},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1758/}
}