Novica Staletović, Nedeljko Tucović, Development of risk assessment and management models as a function of the effectiveness and efficiency of the integrated management system, 16th INTERNATIONAL CONFERENCE MANAGEMENT AND SAFETY M&S 2021, June 18th, 2021 ONLINE CONFERENCE, CONFERENCE THEME: RISK AND CRISIS MANAGEMENT PROGRAM CYCLE: MODERN MANAGEMENT CONCEPTS AND SAFETY; ppt 211-222