SULEMAN, S.; KHAN, S. M.; JAMEEL, T.; ALEEM, W.; SHAFIQ, M. Synthesis and Characterization of Flexible and Rigid Polyurethane Foam. Asian Journal of Applied Sciences, [S. l.], v. 2, n. 5, 2014. Disponível em: https://www.ajouronline.com/index.php/AJAS/article/view/1653. Acesso em: 29 mar. 2024.