D. Hepting, H. Bin Amer, and Y. Yao. Information Processing and Management of Uncertainty in Knowledge-Based Systems. Theory and Foundations, volume 854 of Communications in Computer and Information Science, page 528--537. Cham, Springer International Publishing, (June 2018)
S. Vaidyanathan, and K. Madhavan. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT), 1 (5):
85-95(December 2011)