Holonomy groups of five dimensional Bieberbach groups. Andrzej Szczepanski (1996) Manuscripta mathematica
Homogeneous cohomology manifolds which are inverse limits W. Jakobsche (1991) Fundamenta Mathematicae
Hyperbolic 4-manifolds and conformally flat 3-manifolds Michael Gromov, H. B. Jr. Lawson, W. Thurston (1988) Publications Mathématiques de l'IHÉS
Hyperbolic 4-manifolds and tesselations Nicholaas H. Kuiper (1988) Publications Mathématiques de l'IHÉS