1. Kakas, A.C., Kowalski, R.A., and Toni, F.: ‘The role of abduction in logic programming’, Gabbay, D.M., Hogger, C.J., Robinson, J.A., Handbook of Logic in Artificial Intelligence and Logic Programming, (Oxford Science Publications 1994),5, p. 235–324
2. Mitchell, T.M.: ‘Machine learning’, (McGraw-Hill 1997)
3. ‘An abductive approach for analysing event-based requirements specifications’, Technical, TR2001∕7, 2001