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https://openaccess.city.ac.uk/id/eprint/966/ City Research Online - Quasi-hereditary quotients of finite Chevalley groups and Frobenius kernels city research online chevalley groups quasi hereditary quotients https://ems.press/journals/rmi/articles/14298324 Kazhdan constants for Chevalley groups over the integers | EMS Press Marek Kaluba, Dawid Kielak chevalley groups ems press kazhdan constants integers