@article{10_1023_A_1022220219953,
     author = {Brandts, Jan H.},
     title = {Superconvergence of mixed finite element semi-discretizations of two time-dependent problems},
     journal = {Applications of Mathematics},
     pages = {43--53},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1999},
     doi = {10.1023/A:1022220219953},
     mrnumber = {1666846},
     zbl = {1059.65518},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1023/A:1022220219953/}
}