Heeke Eigenforms in the Cohomology of Congruence Subgroups of SL(3, Z). - Bert van Geemen; Wilberd van der Kallen; Jaap Top; Alain Verberkmoes (Exp. Math., 1997)

Modular Forms for GL(3) and Galois Representations. - Bert van Geemen; Jaap Top (ANTS, 2000)

Quotients of Fermat curves and a Hecke character. - Bert van Geemen; Kenji Koike; Annegret Weng (Finite Fields Their Appl., 2005)