@incollection{MSMF_1971__25__183_0,
     author = {Wolke, Dieter},
     title = {Farey fractions with prime denominator and the large sieve},
     booktitle = {Colloque de th\'eorie des nombres (Bordeaux, 1969)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {183--188},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {25},
     year = {1971},
     doi = {10.24033/msmf.52},
     mrnumber = {51 #12753},
     zbl = {0221.10045},
     url = {http://archive.numdam.org/articles/10.24033/msmf.52/}
}