1. Benyon D, Turner P, Turner S (2005) Designing interactive systems: a comprehensive guide to HCI and interaction design, 2nd edn. Pearson Education Limited, Edinburgh
2. Booth P (1989) An introduction to human-computer interaction. Lawrence Erlbaum Associates Publishers, Hove/East Sussex
3. Carroll JM (2002) Human-computer interaction in the new millennium. Addison-Wesley, New York
4. Carroll M (2004) Usability testing leads to better ROI.
http://www.theusabilitycompany.com/news/media_coverage/pdfs/2003/NewMediaAge_270303.pdf
. Accessed 1 Sept 2014
5. DePaula RA (2003) New era in human computer interaction: the challenges of technology as a social proxy. In: Latin American conference on HCI, ACM international conference proceeding series, Rio de Janeiro, Brazil, pp 219–222