A. Yahi, A. Chassang, L. Raynaud, H. Duthil, and D. Chau. Proceedings of the 20th International Conference on Intelligent User Interfaces, page 275--285. New York, NY, USA, ACM, (2015)
P. Zellweger. Proceedings of the International Conference on Electronic Publishing on Document Manipulation and Typography, page 19--34. New York, NY, USA, Cambridge University Press, (1988)