M. Sirat, E. Maimunah, U. S. Widyastuti, R. Ermawati, M. M. P. Sirat, and D. Desmawan, “Analysis of Demand and Estimation of Market Structure of Beef Trading Business in Bandar Lampung City”, JIPT, vol. 9, no. 2, pp. 152–169, Jul. 2021.