B. Ludwig, и S. Mandl. ECAI 2006, PROCEEDINGS, том 141 из Frontiers in Artificial Intelligence and Applications, стр. 821-822. NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS, I O S PRESS, (2006)17th European Conference on Artificial Intelligence, Riva del Garda,
ITALY, AUG 28, 2006.