J. Hartmann, A. Angeli, и A. Sutcliffe. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, стр. 855--864. New York, NY, USA, ACM, (2008)
J. Kim, D. Gunn, E. Schuh, B. Phillips, R. Pagulayan, и D. Wixon. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, стр. 443--452. New York, NY, USA, ACM, (2008)