@incollection{MSMF_1972__31-32__399_0,
     author = {Zaanen, A. C.},
     title = {The linear modulus of an integral operator},
     booktitle = {Colloque d'analyse fonctionnelle (Bordeaux, 1971)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {399--400},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {31-32},
     year = {1972},
     doi = {10.24033/msmf.108},
     mrnumber = {50 #8172},
     zbl = {0244.47028},
     url = {http://www.numdam.org/articles/10.24033/msmf.108/}
}