Investigations in the area of renewable energy sources, biomass utilization, PM measurements, PM characterization, pollution of the ambient air. Short term scientific missions at Mechanical Engineering Department, Instituto Superior Técnico, Lisbon, Portugal: Experimental investigation of kinetic parameters characterizing the combustion of solid biofuels, 2018, Grant COST STSM Ref.№ COST-STSM- CM1404 – 39773; Biomass gasification in а Drop Tube Furnace, 2019, Grant COST STSM Ref.№ COST-STSM- CM1404 – 43702.