Kuwornu, J. K. M., Narh JNR, A. B., Egyir, I. S., Onumah, E. E., & Gebrezgabher, S. (2017). Willingness to pay for excreta pellet fertilizer: Empirical evidence from Ghana. Acta Agriculturae Slovenica, 109(2), 315–323. https://doi.org/10.14720/aas.2017.109.2.14