@article{104766, author = {Miroslav Bartu\v sek}, title = {Connection between asymptotic properties and zeros of solutions of $y''=q(t)y$}, journal = {Archivum Mathematicum}, volume = {008}, year = {1972}, pages = {113-124}, zbl = {0282.34023}, mrnumber = {0340715}, language = {en}, url = {http://dml.mathdoc.fr/item/104766} }
Bartušek, Miroslav. Connection between asymptotic properties and zeros of solutions of $y''=q(t)y$. Archivum Mathematicum, Tome 008 (1972) pp. 113-124. http://gdmltest.u-ga.fr/item/104766/
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