Paberza, A., A. Fridrihsone-Girone, A. Abolins, and U. Cabulis. 2015. “Polyols from Recycled poly(ethylene Terephthalate) Flakes and Rapeseed Oil for Polyurethane Foams”. Polimery 60 (9):572-78. https://doi.org/10.14314/polimery.2015.572.