Interpolation error estimates of a modified 8-node serendipity finite element. - Jing Zhang; Fumio Kikuchi (Numerische Mathematik, 2000)

Discontinuous Galerkin FEM of hybrid type. - Issei Oikawa; Fumio Kikuchi (JSIAM Lett., 2010)

Strong $L^p$ convergence associated with Rellich-type discrete compactness for discontinuous Galerkin FEM. - Fumio Kikuchi; Daisuke Koyama (JSIAM Lett., 2014)