1. Computing quotients of actions on a free category;Carmody,1991
2. Parallel Program Design;Chandy,1988
3. Generators and Relations for Discrete Groups;Coxeter,1957
4. Coset enumeration in digital computers;Leech;Proc. Camb. Phil. Soc.,1963
5. Computing left Kan extensions using the Todd–Coxeter procedure;Leeming,1995