1. S. Agrawal, S. Chaudhuri, G. Das, Dbxplorer: a system for keyword-based search over relational databases, in: Proceedings of the 18th International Conference on Data Engineering (ICDE), San Jose, CA USA, February 26–March 1, 2002, pp. 1163–1166.
2. G. Bhalotia, A. Hulgeri, C. Nakhe, S. Chakrabarti, S. Sudarshan, Keyword searching and browsing in databases using banks, in: Proceedings of the 18th International Conference on Data Engineering, San Jose, CA, USA, February 26–March 1, 2002, pp. 431–440.
3. L. Luo, X. Lin, W. Wang, X. Zhou, Spark: top-k keyword query in relational databases, in: Proceedings of the ACM SIGMOD International Conference on Management of Data, Beijing, China, June 12–14, 2007, pp. 115–126.
4. V. Hristidis, Y. Papakonstantinou, Discover: Keyword search in relational databases, in: Proceedings of the 28th International Conference on Very Large Databases, August 20–23, Hong Kong, China, 2002, pp. 670–681.
5. B. Ding, Y.J. Xu, W. Shan, Q. Lu, Z. Xiao, L. Xuemin, Finding top-k min-cost connected trees in databases, in: Proceedings of the 23rd International Conference on Data Engineering, ICDE 2007, The Marmara Hotel, Istanbul, Turkey, April 15–20, 2007, pp. 836–845.