L. Effendy, Y. Haryanto, M. Rusmono, and dan A. Pratiyanto, “Empowerment Model of Farmers Group Association (Gapoktan) as a Delivery Point for Subsidized Fertilizer In Several Large Areas Increase Planting (LTT), and Optimize Land (OPLAH) Indonesian Rice Fields”, Sustainability, vol. 10, pp. 32–49, Oct. 2025.