1. AbuHmed, Tamer/ Mohaisen, Abedelaziz/ Nyang, DaeHun: Magazine of Korea Telecommunication Society, Vol. 24, No. 11:25–36, 2007.
2. acatech (Hrsg.): Cyber-Physical Systems-Innovationsmotor für Mobilität, Gesundheit, Energie und Produktion (acatech POSITION), Heidelberg u.a.: Springer Verlag 2011. http://www.acatech.de/fileadmin/use_upload/Baumstruktu_nach_Website/Acatech/root/de/Material_fuer_Sonderseiten/cps/acatech_POSITION_CPS_web.pdf
3. Acquisti, Alessandro/ Gross, Ralph/ Stutzman, Fred: Face Recognition Study, 2011. URL: http://www.heinz.cmu.edu/~acquisti/face-recognition-study-FAQ/
4. Acquisti, Alessandro/ Gross, Ralph: Predicting Social Security Numbers from Public Data, 106 PROC. NAT’L, ACAD, SCI. 10975-80, 2009.
5. Abdul-Rahman, Alfarez: The pgp trust model, EDI-Forum, the Journal of Electronic: 1–6. 1997.