Long Chen
Superconvergence of tetrahedral linear finite element.
Int. J. Numer. Anal. Mod., 3 (2006), pp. 273-282. Abstract
Babuska I, Nobile F, Tempone R
Reliability of computational science
NUMER METH PART D E, 23, 4(2007), Special Issue: Sp. Iss. SI , pp. 753-784