Scientific Research Publishing, a publishing house in USA, which devotes in providing an open access of academic literatures. They have published more than one hundred journals, some of which have been cited by famous databases such as Gale, EBSCO,Proquest,EconLit,and so on. So many good papers can be found by the site for academic references.
R. Agrawal, T. Imielinski, and A. Swami. Proceedings of the 1993 ACM SIGMOD international conference on Management of Data (SIGMOD'93), page 207--216. ACM Press, (May 1993)