@incollection{MSMF_1979__60__129_0,
     author = {Penot, Jean-Paul},
     title = {Fixed point theorems without convexity},
     booktitle = {Analyse non convexe (Pau, 1977)},
     series = {Bulletin de la Soci\'et\'e math\'ematique de France. M\'emoire},
     pages = {129--152},
     year = {1979},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {60},
     doi = {10.24033/msmf.266},
     mrnumber = {81c:47061},
     zbl = {0454.47044},
     url = {https://www.numdam.org/articles/10.24033/msmf.266/}
}