2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65108We calculate the integral cohomology ring structure for various members of the Bianchi group family. The main tools we use are the Bockstein spectral sequence and a long exact sequence derived from Bass-Serre theory.21 pagesAlgebraic Topology20J06 (primary); 11F75, 22E40 (secondary)text