TY - JOUR AU - Brandts, Jan H. TI - Superconvergence of mixed finite element semi-discretizations of two time-dependent problems JO - Applications of Mathematics PY - 1999 SP - 43 EP - 53 VL - 44 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1023/A:1022220219953/ DO - 10.1023/A:1022220219953 LA - en ID - 10_1023_A_1022220219953 ER -