Sebayang, V. B., B. M. Sinaga, H. Harianto, and I. K. Kariyasa. “The Impact of Domestic Policy on Farmers’ Welfare and Maize Processing Industry in Indonesia”. International Journal of Economics and Financial Issues, vol. 9, no. 3, May 2019, pp. 225-32, https://www.econjournals.com/index.php/ijefi/article/view/7910.