D. Pinelle, N. Wong, и T. Stach. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, стр. 1453--1462. New York, NY, USA, ACM, (2008)
D. Scott, S. Al-Jibouri, G. Long, и M. Mawdesley. International Technology, Education and Development Conference (INTED 2009), March 9-11, 2009, Valencia, Spain, (2009)