00341nas a2200121   4500000000100000000000100001008004100002100002200043700001900065700001800084700002400102245009300126       2020                            d1 aDaniela Borissova1 aPetya Cvetkova1 aIvan Garvanov1 aMagdalena Garvanova00aA Framework of Business Intelligence System for Decision Making in Efficiency Management