%0 Journal Article %A Risteski, Ice B. %T Reduction of the modified Poincaré differential equation to Birkhoff matrix form %J Archivum mathematicum %D 2001 %P 103-113 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_2001__37_2_a1/ %G en %F ARM_2001__37_2_a1