1. Matteo Cristani, personal communication.
2. On the logic of theory change: Partial meet contraction and revision functions;Alchourron;The Journal of Symbolic Logic,1985
3. Eliciting matters — controlling skyline sizes by incremental integration of user preferences;Balke,2007
4. Exploiting indifference for customization of partial order skylines;Balke,2006
5. The skyline operator;Börzsönyi,2001