New intergrid transfer operator in multigrid method for P1-nonconforming finite element method. - Kab Seok Kang; Sung Yun Lee (Appl. Math. Comput., 1999)

P1 Nonconforming Finite Element Multigrid Method for Radiation Transport. - Kab Seok Kang (SIAM J. Sci. Comput., 2003)