%0 Journal Article %A Krupková, Olga %T Variational metrics on ${\bf R}\times TM$ and the geometry of nonconservative mechanics %J Mathematica slovaca %D 1994 %P 315-335 %V 44 %N 3 %U http://geodesic.mathdoc.fr/item/MASLO_1994_44_3_a3/ %G en %F MASLO_1994_44_3_a3