00348nas a2200109   4500000000100000000000100001008004100002260007800043100002100121700001700142245007900159       2020                            d  cNovember 27-28bUniversity of National and World Economy aSofia,Bulgaria1 aSvetoslav Ivanov1 aPavel Petrov00aDevelopment of Software Systems by Using Interaction  Business Scenarios