%0 Journal Article %A Mařík, Robert %T Nonnegativity of functionals corresponding to the second order half-linear differential equation %J Archivum mathematicum %D 1999 %P 155-164 %V 35 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1999__35_2_a7/ %G en %F ARM_1999__35_2_a7