Superconvergence for Optimal Control Problems Governed by Semi-linear Elliptic Equations. - Yanping Chen 002; Yongquan Dai (J. Sci. Comput., 2009)

Superconvergence of triangular mixed finite elements for optimal control problems with an integral constraint. - Jianwei Zhou; Yanping Chen 002; Yongquan Dai (Appl. Math. Comput., 2010)