1. Statistical Analysis with Missing Data;Little,1987
2. Machine Learning;Mitchell,1997
3. Rough set approach to incomplete information systems;Kryszkiewicz;Inform. Sci.,1998
4. Rules in incomplete information systems;Kryszkiewicz;Inform. Sci.,1999
5. Rough set approach to rules generation from incomplete information systems;Kryszkiewicz;Encyclopedia Comput. Sci. Technol.,2001