%0 Journal Article %A Saunders, David J. %T Jets and the variational calculus %J Communications in Mathematics %D 2021 %P 91-114 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/COMIM_2021__29_1_a5/ %G en %F COMIM_2021__29_1_a5