D. Russell, M. Stefik, P. Pirolli, und S. Card. CHI '93: Proceedings of the SIGCHI conference on Human factors in computing systems, Seite 269--276. New York, NY, USA, ACM Press, (1993)
D. Russell, M. Stefik, P. Pirolli, und S. Card. CHI '93: Proceedings of the SIGCHI conference on Human factors in computing systems, Seite 269--276. New York, NY, USA, ACM Press, (1993)