1. The ontologies of industrial ecology;Allenby;Progress in Industrial Ecology (Inderscience Enterprises Ltd.),2006
2. Classes of small-world networks;Amaral;Proceedings of the National Academy of Sciences of the United States of America,2000
3. ASONAM (The IEEE/ACM International Conference on Advances in Social Network Analysis and Mining) www.asonam2014.org/
4. Scale free networks;Barabási;Scientific American,2003
5. Some analyses of Erdos collaboration graph;Batagelj;Social Networks,2000