1. Batagelj, V., & Mrvar, A. (2003). Pajek: analysis and visualization of large networks. In M. Jünger & P. Mutzel (Eds.), Graph drawing software (pp. 77–103). Berlin: Springer.
2. Deese, J. (1965). The structure of associations in language and thought. Baltimore: The Johns Hopkins Press.
3. Fasiha, M. Y. N., Sakayama, Y., Yamamoto, E., Taura, T., & Nagai, Y. (2010). Understanding the nature of deep impressions by analyzing the structure of virtual impression networks. Proceedings of international design conference DESIGN 2010, 17–20 May, Dubrovnik, Croatia.
4. Fellbaum, C. (1998). WordNet: An electronic lexical database. Cambridge: MIT Press.
5. Fukuda, S. (2011). Emotion: A gateway to wisdom engineering. In S. Fukuda (Ed.), Emotional engineering: Service development (pp. 1–20). London: Springer.