1. Chi, E.H., Pitkow, J., Mackinlay, J., Pirolli, P., Gossweiler, R., Card, S.K.: Visualizing the evolution of web ecologies. In: Proc. CHI 1998, pp. 400–407. ACM Press/Addison-Wesley (1998)
2. Chow, S.C.: Generating and Drawing Area-Proportional Euler and Venn Diagrams. PhD thesis, University of Victoria (2007)
3. De Chiara, R., Erra, U., Scarano, V.: VennFS: A Venn diagram file manager. In: Proc. InfoVis 2003, pp. 120–126. IEEE Computer Society Press, Los Alamitos (2003)
4. Ehrenfeucht, A., Rozenberg, G.: Events and modules in reaction systems. Theoretical Computer Science 376(1-2), 3–16 (2007)
5. Ehrenfeucht, A., Rozenberg, G.: Reaction systems. Fundamenta Informaticae 75(1-4), 263–280 (2007)