%0 Journal Article %A Došlý, Ondřej %T On the existence of conjugate points for linear differential systems %J Mathematica slovaca %D 1990 %P 87-99 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1990__40_1_a9/ %G en %F MASLO_1990__40_1_a9