1. Ackerman, M., Cranor, L., 1999. Privacy Critics: UI Components to Safeguard Users’ Privacy. Paper presented at the CHI’, 99, pp. 258–259.
2. Acquisti, A., 2002. Protecting Privacy with Economics: Economic Incentives for Preventive Technologies in Ubiquitous Computing Environments. Paper presented at the Workshop on Socially informed Design of Privacy-enhancing Solutions in Ubiquitous Computing, UbiComp 2002.
3. Acquisti, A., 2004. Privacy in electronic commerce and the economics of immediate gratification. Paper presented at the 5th ACM conference on Electronic commerce, pp. 21–29.
4. AT&T., 2003. Privacy Bird, available from: http://www.privacybird.com
5. AT&T., 2004. Find People Nearby. Retrieved 31 January, 2005, available from: http://www.attwireless.com/personal/features/organization/findfriends.jhtml