@article{10_4064_ap_27_1_55_60,
     author = {A. Sobolewska},
     title = {Sur quelques in\'egalit\'es diff\'erentielles relatives \`a des lignes polygonales},
     journal = {Annales Polonici Mathematici},
     pages = {55--60},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1972},
     doi = {10.4064/ap-27-1-55-60},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-27-1-55-60/}
}