Dadzie Peter Kessels, et al. “Timber Merchantable Residue Quantities and Harvesting Efficiency in Tropical Forests of Ghana; Drivers of Wood Residue Utilization for Forest Conservation”. Global Journal of Science Frontier Research, vol. 14, no. H5, Mar. 2014, pp. 33-46, https://journalofscience.org/index.php/GJSFR/article/view/1443.