Haim Kilov Emergence and Convergence: Qualitative Novelty and the Unity of Knowledge By Mario Bunge. 88-90 2004 33 SIGMOD Record 4 http://doi.acm.org/10.1145/1041410.1041429 http://www.sigmod.org/sigmod/record/issues/0412/18.R2-Kilov.pdf db/journals/sigmod/sigmod33.html#Kilov04