%0 Journal Article %A Wiktor Szczyrba %T Lagrangian formalism in the classical field theory %J Annales Polonici Mathematici %D 1976 %P 145-185 %V 32 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-32-2-145-185/ %R 10.4064/ap-32-2-145-185 %G en %F 10_4064_ap_32_2_145_185