H. A. Hamdi, A. T. Battor, and A. D. Shaban, “The Role of Polyurethane Foam Modified with Feather as an Oil Sorbent: doi.org/10.26538/tjnpr/v5i7.9”, TJNPR, vol. 5, no. 7, pp. 1219–1222, Jul. 2021.