Bekele, S., A. Abebaw, and L. D. Bayissa. “ Selected Nutritional Values and Physicochemical Properties of Traditionally Prepared Ethiopian Fresh Butter Intended for Direct Consumption”. Journal of Science and Sustainable Development, vol. 6, no. 2, July 2018, pp. 37-50, doi:10.20372/au.jssd.6.2.2018.088.