Sub-classes of the monoid of left cancellative languages. - Chunhua Cao; Di Yang 004; Yun Liu (Int. J. Comput. Math., 2011)

Disjunctive languages related to p-primitive words. - Chunhua Cao; Di Yang 004; Yin Liu (Acta Informatica, 2012)

Some kinds of primitive and non-primitive words. - Chunhua Cao; Shuang Yang; Di Yang 004 (Acta Informatica, 2014)

Characterizations of k-comma codes and k-comma intercodes. - Chunhua Cao; Haiyan Liu; Di Yang 004 (Acta Informatica, 2016)

A first step in characterizing three-element codes. - Chunhua Cao; Lu Qing; Di Yang 004 (Acta Informatica, 2018)

A free monoid containing all strongly Bi-singular languages and non-primitive words. - Chunhua Cao; Ling Li; Di Yang 004 (Int. J. Comput. Math. Comput. Syst. Theory, 2019)

Some properties of d-codes. - Chunhua Cao; Haiyan Liu; Di Yang 004 (Int. J. Comput. Math. Comput. Syst. Theory, 2021)

The second step in characterizing a three-word code. - Chunhua Cao; Jiao Xu; Lei Liao; Di Yang 004; Guichuan Jia; Qian Du 013 (Acta Informatica, 2023)

Three-word codes $ {a, aba, u }$ and $ {a, ab, v }$ having finite completions. - Chunhua Cao; Lei Liao; Zhongmei Yan; Di Yang 004; Yuguang Yuan (Acta Informatica, 2025)