Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Mark Keith, Benjamin Shao, Paul John Steinbart. The usability of passphrases for authentication: An empirical field study. International Journal of Man-Machine Studies, 65(1):17-28, 2007. [doi]