Osabohien, E. . ., U. . Soya, and N. O. . Ojeifo. “Characteristics of Natural Rubber – Carbonized Pawpaw Seed Composites”. International Journal of Biological and Chemical Sciences, vol. 14, no. 8, Dec. 2020, pp. 2951-64, doi:10.4314/ijbcs.v14i8.23.