@article{104710, author = {Jarom\'\i r Vosmansk\'y}, title = {Monotonic properties of zeros and extremants of the differential equation $y''+q(t)y=0$}, journal = {Archivum Mathematicum}, volume = {006}, year = {1970}, pages = {37-74}, zbl = {0239.34014}, mrnumber = {0296420}, language = {en}, url = {http://dml.mathdoc.fr/item/104710} }
Vosmanský, Jaromír. Monotonic properties of zeros and extremants of the differential equation $y''+q(t)y=0$. Archivum Mathematicum, Tome 006 (1970) pp. 37-74. http://gdmltest.u-ga.fr/item/104710/
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