@article{10_21136_CMJ_2019_0312_18,
     author = {Droniou, J\'er\^ome and Eymard, Robert and Gallou\"et, Thierry and Herbin, Rapha\`ele},
     title = {A unified analysis of elliptic problems with various boundary conditions and their approximation},
     journal = {Czechoslovak Mathematical Journal},
     pages = {339--368},
     publisher = {mathdoc},
     volume = {70},
     number = {2},
     year = {2020},
     doi = {10.21136/CMJ.2019.0312-18},
     mrnumber = {4111847},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2019.0312-18/}
}