Older adults and web usability: is web experience the same as web expertise? - Ann Chadwick-Dias; Donna P. Tedesco; Thomas S. Tullis (CHI Extended Abstracts, 2004)

Using personal photos as pictorial passwords. - Thomas S. Tullis; Donna P. Tedesco (CHI Extended Abstracts, 2005)

Can users remember their pictorial passwords six years later. - Thomas S. Tullis; Donna P. Tedesco; Kate E. McCaffrey (CHI Extended Abstracts, 2011)