Plangprasopchok, A. and Lerman, K.. Constructing folksonomies from user-specified relations on flickr. WWW '09: Proceedings of the 18th international conference on World wide web. 781--790, ACM, New York, NY, USA, Year 2009.

Medelyan, Olena and Legg, Catherine and Milne, David and Witten, Ian H.. Mining Meaning from Wikipedia. Year 2008.

McRae, K and Cree, G S and Seidenberg, M S and McNorgan, C. Semantic feature production norms for a large set of living and nonliving things. In Behav Res Methods, (37) 4: 547-559, Year 2005.