@article{ARM_1978__14_2_a4,
     author = {Stan\v{e}k, Svatoslav},
     title = {Phase and dispersion theory of the differential equation $y''=q(t)y$ in connection with the generalized {Floquet} theory},
     journal = {Archivum mathematicum},
     pages = {109--122},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1978},
     mrnumber = {512750},
     zbl = {0412.34025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1978__14_2_a4/}
}