@article{AUPO_1983__22_1_a8,
     author = {Stan\v{e}k, Svatoslav},
     title = {On a structure of second order linear differential equations with periodic coefficients having the same discriminant},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {91--98},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1983},
     mrnumber = {744703},
     zbl = {0584.34004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1983__22_1_a8/}
}