I. Diakidoy, A. Kakas, L. Michael, and R. Miller. COMMA, volume 266 of Frontiers in Artificial Intelligence and Applications, page 31-42. IOS Press, (2014)
M. Denecker, and A. Kakas. Computational Logic: Logic Programming and Beyond, volume 2407 of Lecture Notes in Computer Science, page 402-436. Springer, (2002)