%0 Journal Article %A Chrastina, Jan %T Inverse problem of the classical calculus of variations %J Archivum mathematicum %D 1982 %P 9-14 %V 18 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1982__18_1_a1/ %G en %F ARM_1982__18_1_a1