فيصل مفتاح شلوف و أحمد محمد أحمد عريدة. “An Economic Study of Estimating Cost Function of Dates Production in Wadi Al-Shati and Sebha Municipalities, South Libya”. Journal of Pure & Applied Sciences, vol. 16, no. 1, Sept. 2017, doi:10.51984/jopas.v16i1.974.