@incollection{MSMF_1971__25__169_0,
     author = {Stephens, P.-J.},
     title = {An average form of {Artin's} conjecture},
     booktitle = {Colloque de th\'eorie des nombres (Bordeaux, 1969)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {169--172},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {25},
     year = {1971},
     doi = {10.24033/msmf.50},
     mrnumber = {50 #12978},
     zbl = {0215.35602},
     url = {http://www.numdam.org/articles/10.24033/msmf.50/}
}