@article{10_4064_ap5_3_275_283,
     author = {S. Go{\l}\k{a}b and M. Kuczma and Z. Opial},
     title = {La courbure d'une courbe plane et l'existence d'une asymptote},
     journal = {Annales Polonici Mathematici},
     pages = {275--283},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1958},
     doi = {10.4064/ap5-3-275-283},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap5-3-275-283/}
}