d-Primitive Words and D(1)-Concatenated Words. - Itaru Kataoka; Tetsuo Moriya (IEICE Trans. Inf. Syst., 2009)

On Non-overlapping Words. - Tetsuo Moriya; Itaru Kataoka (IEICE Trans. Inf. Syst., 2011)

d-Primitive Words and Contextual Grammars. - Tetsuo Moriya; Itaru Kataoka (IEICE Trans. Inf. Syst., 2012)

A Note on Pcodes of Partial Words. - Tetsuo Moriya; Itaru Kataoka (IEICE Trans. Inf. Syst., 2014)