TY - JOUR AU - Jia, Shanghui AU - Li, Deli AU - Liu, Tang AU - Zhang, Shuhua TI - Richardson extrapolation and defect correction of mixed finite element methods for integro-differential equations in porous media JO - Applications of Mathematics PY - 2008 SP - 13 EP - 39 VL - 53 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1007/s10492-008-0011-3/ DO - 10.1007/s10492-008-0011-3 LA - en ID - 10_1007_s10492_008_0011_3 ER -