Medne, Olita, Ilo Dreijers, and Līga Bērziņa. “ANALYSES OF THE CAUSE AND EFFECT DIAGRAMMS OF EXPANDED POLYSTYRENE MANUFACTURING PROCESS”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 3, 2015): 50–55. Accessed December 10, 2024. https://journals23.rta.lv/index.php/ETR/article/view/1108.