1. Lecture Notes in Mathematics;Abikoff, William,1980
2. Annals of Mathematics Studies, No. 82;Birman, Joan S.,1974
3. [BE] B. Bowditch and D. B. A. Epstein, Triangulations associated with punctured surfaces, preprint (1985).
4. Quantum field theory techniques in graphical enumeration;Bessis, D.;Adv. in Appl. Math.,1980
5. [EP] D. B. A. Epstein and R. C. Penner, Teichmüller spaces of punctured surfaces, preprint (1984).