@article{AUPO_1977__16_1_a5,
     author = {Stan\v{e}k, Svatoslav},
     title = {A criterion for determining the 2$^nd$ order linear differential equations possessing the central dispersion with the index  $n$ equal to $t+\pi$},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {75--79},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1977},
     mrnumber = {0594950},
     zbl = {0412.34020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1977__16_1_a5/}
}