%0 Journal Article %A Höpker, Martin %A Böhm, Michael %T A note on the existence of extension operators for Sobolev spaces on periodic domains %J Comptes Rendus. Mathématique %D 2014 %P 807-810 %V 352 %N 10 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2014.09.002/ %R 10.1016/j.crma.2014.09.002 %G en %F CRMATH_2014__352_10_807_0