@article{104821, author = {Jarom\'\i r Vosmansk\'y}, title = {Certain higher monotonicity properties of $i$-th derivatives of solutions of $y''+a(t)y'+b(t)y=0$}, journal = {Archivum Mathematicum}, volume = {010}, year = {1974}, pages = {87-102}, zbl = {0318.34048}, mrnumber = {0399578}, language = {en}, url = {http://dml.mathdoc.fr/item/104821} }
Vosmanský, Jaromír. Certain higher monotonicity properties of $i$-th derivatives of solutions of $y''+a(t)y'+b(t)y=0$. Archivum Mathematicum, Tome 010 (1974) pp. 87-102. http://gdmltest.u-ga.fr/item/104821/
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