de Silva, C.H.Williams, M.H.2015-04-272015-04-272000De Silva, Chandima H. and Williams, M. Howard, 2000. Extending the 007 benchmark for deductive object-oriented databases, Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka; 2000: pp 29.http://repository.kln.ac.lk/handle/123456789/7116enArticle