Djauhari, Aman, and Amiruddin Syam. “Sistem Pengelolaan Lahan Kering Di Daerah Aliran Sungai Brantas Bagian Hulu”. Forum Penelitian Agro Ekonomi, vol. 14, no. 1, Sept. 2016, pp. 24-40, https://epublikasi.pertanian.go.id/berkala/fae/article/view/1315.