The volume spectrum of hyperbolic 4-manifolds. Ratcliffe, John G.; Tschantz, Steven T. — 2000 Experimental Mathematics
The smallest hyperbolic 6-manifolds. Everitt, Brent; Ratcliffe, John; Tschantz, Steven — 2005 Electronic Research Announcements of the American Mathematical Society [electronic only]
Complements of tori and Klein bottles in the 4-sphere that have hyperbolic structure. Ivanšić, Dubravko; Ratcliffe, John G.; Tschantz, Steven T. — 2005 Algebraic & Geometric Topology
Volumes of integral congruence hyperbolic manifolds. John G. Ratcliffe; Steven T. Tschantz — 1997 Journal für die reine und angewandte Mathematik