Anastasia Analyti Nicolas Spyratos Panos Constantopoulos Deriving Semantic Information through Property Covering and Inheritance. 3-30 1998 28 Data Knowl. Eng. 1 db/journals/dke/dke28.html#AnalytiSC98 http://dx.doi.org/10.1016/S0169-023X(98)00011-1