Zhang-Zhang Polynomials of Ribbons. - Bing-Hau He; Chien-Pin Chou; Johanna Langner; Henryk A. Witek (Symmetry, 2020)

Enumeration of Clar covers of parallelogram chains. - Bing-Hau He; Henryk A. Witek (Discret. Appl. Math., 2021)