1. Dunham M. Data mining introduction and advanced topics. Prentice Hall; 2003. ISBN:0-13-088892-3.
2. Fayad UM, Piatetsky-Sjapiro G, Smyth P. From data mining to knowledge discovery: an overview. In: Fayard UM, Piatetsky-Sjapiro G, Smyth P, Uthurusamy R, editors. Knowledge discovery in databases. AAAI/MIT Press; Boston; 1996.
3. Ginsburg S. Richard hull: ordered attribute domains in the relational model. In: XP2 Workshop on Relational Database Theory; 1981.
4. Ginsburg S. Richard hull: order dependency in the relational model. Theor Comput Sci. 1983;26:149–95.
5. Gracia-Molina H, Ullman J, Windin J. Database systems the complete book. New Jersey: Prentice Hall; 2002.