@article{10_4064_ap5_3_263_274,
     author = {Z. Opial},
     title = {Sur les courbes planes \`a courbure presque constante},
     journal = {Annales Polonici Mathematici},
     pages = {263--274},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1958},
     doi = {10.4064/ap5-3-263-274},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap5-3-263-274/}
}