Intruder state avoidance multireference Møller-Plesset perturbation theory. - Henryk A. Witek; Yoong-Kee Choe; James P. Finley; Kimihiko Hirao (J. Comput. Chem., 2002)

Multireference perturbation theory with optimized partitioning. II. Applications to molecular systems. - Henryk A. Witek; Haruyuki Nakano; Kimihiko Hirao (J. Comput. Chem., 2003)

The Genetic Algorithms Population Pluglet for the H2O Metacomputing System. - Tomasz Ampula; Dawid Kurzyniec; Vaidy S. Sunderam; Henryk A. Witek (International Conference on Computational Science, 2004)

Systematic study of vibrational frequencies calculated with the self-consistent charge density functional tight-binding method. - Henryk A. Witek; Keiji Morokuma (J. Comput. Chem., 2004)

Intruder states in multireference perturbation theory: The ground state of manganese dimer. - Cristopher Camacho; Henryk A. Witek; Shigeyoshi Yamamoto (J. Comput. Chem., 2009)

Closed-form formulas for the Zhang-Zhang polynomials of benzenoid structures: Prolate rectangles and their generalizations. - Chien-Pin Chou; Jin-Su Kang; Henryk A. Witek (Discret. Appl. Math., 2016)

Equivalence between Clar covering polynomials of single zigzag chains and tiling polynomials of 2×n rectangles. - Johanna Langner; Henryk A. Witek (Discret. Appl. Math., 2018)

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

ZZ Polynomials for Isomers of (5, 6)-Fullerenes Cn with n = 20-50. - Henryk A. Witek; Jin-Su Kang (Symmetry, 2020)

Clar Covers of Overlapping Benzenoids: Case of Two Identically-Oriented Parallelograms. - Henryk A. Witek; Johanna Langner (Symmetry, 2020)

Extended strict order polynomial of a poset and fixed elements of linear extensions. - Johanna Langner; Henryk A. Witek (Australas. J Comb., 2021)

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

ZZPolyCalc: An open-source code with fragment caching for determination of Zhang-Zhang polynomials of carbon nanostructures. - Rafal Podeszwa; Henryk A. Witek; Chien-Pin Chou (Comput. Phys. Commun., 2024)