@article{10_4064_ap_6_1_105_110,
     author = {Z. Opial},
     title = {Sur la r\'epartition asymptotique des z\'eros des fonctions caract\'eristiques du probl\`eme de {Sturm}},
     journal = {Annales Polonici Mathematici},
     pages = {105--110},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1959},
     doi = {10.4064/ap-6-1-105-110},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-6-1-105-110/}
}