@article{AUPO_1978__17_1_a5,
     author = {Stan\v{e}k, Svatoslav},
     title = {On the structure of the second-order periodic linear differential equations with the same characteristic multipliers},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {53--60},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1978},
     mrnumber = {0554036},
     zbl = {0426.34008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1978__17_1_a5/}
}