Автори

• Uler-Zefikj Monika Faculty of Mechanical Engineering, “Ss. Cyril and Methodius” University in Skopje, P.O.Box 464, MK-1001 Skopje, Republic of North Macedonia
• Dimitrovski Dame Faculty of Mechanical Engineering, “Ss. Cyril and Methodius” University in Skopje, P.O.Box 464, MK-1001 Skopje, Republic of North Macedonia
• Mančevski Aleksandar Association 6th Star - Energy, Waste and Environment Department