@incollection{MSMF_1969__19__21_0,
     author = {Lafontaine, Jacques},
     title = {R\'eunions d'ensembles de convergence absolue},
     booktitle = {Contributions \`a la th\'eorie des s\'eries trigonom\'etriques et \`a la th\'eorie des nombres},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {21--25},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {19},
     year = {1969},
     doi = {10.24033/msmf.20},
     mrnumber = {52 #14799},
     zbl = {0195.07502},
     url = {http://www.numdam.org/articles/10.24033/msmf.20/}
}