Olayiwola, Y. B., Oluyege, O. A., & Labunmi, L. (2020). Direct Solvent Liquefaction of Tropical Hardwood Bark and Characterization of the Resulting Bio-Oil. Journal of Energy Research and Reviews, 5(1), 1-7. https://doi.org/10.9734/jenrr/2020/v5i130137