Algorithms to play Mastermind. - T. Mahadeva Rao; G. Kazin; D. O'Brien (SIGART Newsl., 1986)

Role-Based Access Control Framework for Network Enterprises. - D. J. Thomsen; D. O'Brien; J. Bogle (ACSAC, 1998)

Intrusion Tolerant Web Servers via Network Layer Controls. - D. O'Brien (DISCEX (2), 2003)