@article{M2AN_2017__51_4_1367_0,
     author = {Ern, Alexandre and Guermond, Jean-Luc},
     title = {Finite element quasi-interpolation and best approximation},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {1367--1385},
     publisher = {EDP-Sciences},
     volume = {51},
     number = {4},
     year = {2017},
     doi = {10.1051/m2an/2016066},
     mrnumber = {3702417},
     zbl = {1378.65041},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/m2an/2016066/}
}