Cuspidal Modular Symbols are Transportable. - William A. Stein; Helena A. Verrill (LMS J. Comput. Math., 2001)

Transportable Modular Symbols and the Intersection Pairing. - Helena A. Verrill (ANTS, 2002)

Coin-Moving Puzzles - Erik D. Demaine; Martin L. Demaine; Helena A. Verrill (CoRR, 2002)

Computing with toric varieties. - Helena A. Verrill; David Joyner (J. Symb. Comput., 2007)

Modular Forms on Noncongruence Subgroups and Atkin-Swinnerton-Dyer Relations. - Liqun Fang; J. William Hoffman; Benjamin Linowitz; Andrew Rupinski; Helena A. Verrill (Exp. Math., 2010)

Lifts of projective congruence groups. - Ian Kiming; Matthias Schütt; Helena A. Verrill (J. Lond. Math. Soc., 2011)

L-systems for the boundaries of plane-filling folding curves. - Helena A. Verrill (Theor. Comput. Sci., 2025)