Radoslaw Katarzyniak Ngoc Thanh Nguyen Lakhmi C. Jain A Model for Fuzzy Grounding of Modal Conjunctions in Artificial Cognitive Agents. 341-350 2008 KES-AMSTA http://dx.doi.org/10.1007/978-3-540-78582-8_35 conf/kesamsta/2008 db/conf/kesamsta/kesamsta2008.html#KatarzyniakNJ08