Solution Methods for the Poisson Equation with Corner Singularities: Numerical Results. - Zhiqiang Cai 001; Seokchan Kim; Byeong Chun Shin (SIAM J. Sci. Comput., 2001)

The Discrete First-Order System Least Squares: The Second-Order Elliptic Boundary Value Problem. - Zhiqiang Cai 001; Byeong Chun Shin (SIAM J. Numer. Anal., 2002)