@article{RLIN_2001_9_12_3_a1,
     author = {Brezzi, Franco and Hughes, Thomas J. R. and S\"uli, Endre},
     title = {Variational approximation of flux in conforming finite element methods for elliptic partial differential equations : a model problem},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {159--166},
     publisher = {mathdoc},
     volume = {Ser. 9, 12},
     number = {3},
     year = {2001},
     zbl = {1221.65304},
     mrnumber = {1306924},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_2001_9_12_3_a1/}
}