Ejilah, Robinson Ichakpa, Abdulkadir Lukman, and Adisa Ademola Bello. 2012. “Investigation of Sclerocarya Birrea Seed Oil Extracted As a Bioenergy Resource for Compression Ignition Engines”. International Journal of Agricultural and Biological Engineering 5 (3):59-67. https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/552.