@article{AUPO_1981_20_1_a9,
     author = {Stan\v{e}k, Svatoslav},
     title = {On limit properties of phases and of central dispersions in the oscillatory equation $y'' = q(t) y$ with a periodic coefficient},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {85--92},
     year = {1981},
     volume = {20},
     number = {1},
     mrnumber = {0645891},
     zbl = {0498.34017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1981_20_1_a9/}
}