Kurańska, M., A. Prociak, S. Michałowski, and A. Zawadzińska. 2021. “The Influence of Blowing Agents Type on Foaming Process and Properties of Rigid Polyurethane Foams”. Polimery 63 (10):672-78. https://doi.org/10.14314/polimery.2018.10.2.