1. Agrawal R, Srikant R (1994) In: Proceedings of the 20th International Conference on very large data bases morgan kaufmann publishers Inc., San Francisco, VLDB ’94, pp 487–499. http://dl.acm.org/citation.cfm?id=645920.672836
2. Aiello A, Burattini E, Tamburrini G (1995) Int J Intell Syst 10(8), 735. doi: 10.1002/int.4550100804
3. B Incorporation (2013) Url shortening and bookmarking services. http://bitly.com/
4. Breiman L (2001) Mach. Learn. 45(1), 5. doi: 10.1023/A:1010933404324
5. Bioportal N (2009) Gazetteer Ontol. http://bioportal.bioontology.org/ontologies/GAZ