Schoof, René Max Planck Society;
Washington, Lawrence Max Planck Society;
Zagier, Don Max Planck Institute for Mathematics, Max Planck Society;
Mestre, J.-F., Schoof, R., Washington, L., & Zagier, D. (1993). Homophonic quotients of free groups. (Quotients homophones des groupes libres.). Experimental Mathematics, 2(3), 153-155.