Computer Condensation of Modular Representations. - Alexander J. E. Ryba (J. Symb. Comput., 1990)

Matrix generators for the Harada-Norton group. - Alexander J. E. Ryba; Robert A. Wilson (Exp. Math., 1994)

The Hexad Game. - Joseph Kahane; Alexander J. E. Ryba (Electron. J. Comb., 2001)

Embeddings of PSL(2, 41) and PSL(2, 49) in E8(C). - Robert L. Griess Jr.; Alexander J. E. Ryba (J. Symb. Comput., 2001)

Condensation of Symmetrized Tensor Powers. - Alexander J. E. Ryba (J. Symb. Comput., 2001)

Construction of Some Irreducible Subgroups of E8 and E6. - Alexander J. E. Ryba (LMS J. Comput. Math., 2007)