@incollection{MSMF_1979__60__31_0,
     author = {Dedieu, Jean-Pierre},
     title = {C\^ones asymptotes d'ensembles non convexes},
     booktitle = {Analyse non convexe (Pau, 1977)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {31--44},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {60},
     year = {1979},
     doi = {10.24033/msmf.259},
     mrnumber = {83i:46052},
     zbl = {0433.46005},
     url = {http://archive.numdam.org/articles/10.24033/msmf.259/}
}