M. E. Essilfie, H. K. Dapaah, J. Ofosu-Anim, E. T. Blay, and J. C. Norman, “Assessment of Changes in Beta-carotene Content and Sensory Attributes of Two Sweet Potato Varieties as Influenced by Organic and Inorganic Fertilizers and Storage Methods”, Recent Advances in Biological Research Vol. 2, pp. 144-154, Jul. 2019.