@article{bwmeta1.element.bwnjournal-article-apmv7i3p293bwm,
author = {Opial, Z.},
title = {Sur les solutions de classe $(L^2)$ de l'\'equation diff\'erentielle u'' + q(t)u = 0},
journal = {Annales Polonici Mathematici},
volume = {8},
year = {1960},
pages = {293-303},
zbl = {0091.26303},
language = {fra},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-apmv7i3p293bwm}
}
Opial, Z. Sur les solutions de classe $(L^2)$ de l’équation différentielle u” + q(t)u = 0. Annales Polonici Mathematici, Tome 8 (1960) pp. 293-303. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-apmv7i3p293bwm/