Zbigniew Lukasik, Aldona Kuśmińska-Fijalkowska, and Sylwia Olszańska. “Improvement of the Logistic Processes Using the Reverse Logistics Concept”. Communications - Scientific Letters of the University of Zilina, Vol. 23, no. 3, July 2021, pp. A174-A183, doi:10.26552/com.C.2021.3.A174-A183.