%0 Journal Article %A Hamid Said %T An analytical mechanics approach to the first law of thermodynamics and construction of a variational hierarchy %J Theoretical and applied mechanics %D 2021 %P 1 - 28 %V 48 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAM_2021_48_1_a0/ %F TAM_2021_48_1_a0