Victor, E.I, J.O Okechukwu, and N.O Alfred. 2019. “Comparison of Flexible Polyurethane Foam Produced by Using Sunflower Oil, Soybean Oil and Palm Kernel Oil As Polyol”. International Journal of Industrial Engineering 3 (5 & 6): 42-46. https://doi.org/10.65000/36ftdf66.