1. Institute for Research in Circular Economy and Environment “Ernest Lupan”, 400689 Cluj-Napoca, Romania
2. Faculty of Industrial Engineering, Robotics and Production Management, Technical University of Cluj-Napoca, 400000 Cluj-Napoca, Romania
3. Faculty of Engineering, Lucian Blaga University of Sibiu, 10 Victoriei Blv., 550024 Sibiu, Romania
4. Theoretical and Applied Science Department, Insubria University, Via G.B. Vico, 46, I-21100 Varese, Italy