1. Agrawala, M. and Stolte, C. Rendering effective route maps: improving usability through generalization. Proceedings of the 28th annual conference on computer graphics and interactive techniques (SIGGRAPH’01). pp.241–249. New York: ACM Press.
2. Avelar, S. and Huber, R. Modeling a public transport network for generation of schematic maps and location queries. Proceedings of the 20th international cartographic conference. pp.1472–1480. Beijing: International Cartographic Association.