K. Choi, K. Dantu, W. Cheng, и M. Pedram. ICCAD '02: Proceedings of the 2002 IEEE/ACM international conference on Computer-aided design, стр. 732--737. New York, NY, USA, ACM, (2002)
R. Chung, P. Mirica, и B. Plimmer. Proceedings of the 6th ACM SIGCHI New Zealand chapter's international conference on Computer-human interaction: making CHI natural (CHINZ'05), том 94 из ACM International Conference Proceeding Series, стр. 29-30. ACM, (2005)