%0 Journal Article %A Neuman, František %A Staněk, Svatoslav %T On the structure of second-order periodic differential equations with given characteristic multipliers %J Archivum mathematicum %D 1977 %P 149-157 %V 13 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1977__13_3_a3/ %G en %F ARM_1977__13_3_a3