%0 Journal Article %A G. Bourdaud %T An introduction to composition operators in Sobolev spaces %J Eurasian mathematical journal %D 2023 %P 39-54 %V 14 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/EMJ_2023_14_1_a3/ %G en %F EMJ_2023_14_1_a3