%0 Journal Article %A Droniou, Jérôme %A Eymard, Robert %A Gallouët, Thierry %A Herbin, Raphaèle %T A unified analysis of elliptic problems with various boundary conditions and their approximation %J Czechoslovak Mathematical Journal %D 2020 %P 339-368 %V 70 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2019.0312-18/ %R 10.21136/CMJ.2019.0312-18 %G en %F 10_21136_CMJ_2019_0312_18