D. Dimitrov, C. Knauer, K. Kriegel, и F. Stehn. VISAPP (1), стр. 188-195. INSTICC - Institute for Systems and Technologies of Information, Control and Communication, (2008)
D. Dimitrov, C. Knauer, и K. Kriegel. VISAPP (1), стр. 393-400. INSTICC - Institute for Systems and Technologies of Information, Control and Communication, (2006)