@incollection{MSMF_1979__60__25_0,
     author = {Antoine, P.},
     title = {Lemme de {Morse} et calcul des variations},
     booktitle = {Analyse non convexe (Pau, 1977)},
     series = {Bulletin de la Soci\'et\'e math\'ematique de France. M\'emoire},
     pages = {25--29},
     year = {1979},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {60},
     doi = {10.24033/msmf.258},
     mrnumber = {82d:58018},
     zbl = {0414.58010},
     url = {https://www.numdam.org/articles/10.24033/msmf.258/}
}