@article{ARM_1974__10_2_a0,
     author = {H\'a\v{c}ik, Milo\v{s}},
     title = {Higher monotonicity properties of zero points of the linear combination of the solution and its first derivative of the differential equation $y''+q(t)y=0$},
     journal = {Archivum mathematicum},
     pages = {67--77},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1974},
     mrnumber = {0399579},
     zbl = {0318.34043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1974__10_2_a0/}
}