P-disjunctive omega-languages. - Zuhua Liu; Chunhua Cao (Int. J. Comput. Math., 2011)

Composing short 3-compressing words on a 2-letter alphabet. - Alessandra Cherubini; Achille Frigeri; Zuhua Liu (Discret. Math. Theor. Comput. Sci., 2017)

The applications of solid codes to r-R and r-D languages. - Zuhua Liu; Yuqi Guo; Jing Leng (Soft Comput., 2019)