1. Agus, F. 2011. Environmental and sustainability issues of Indonesia agriculture. Jurnal Penelitian Dan Pengembangan Pertanian 30 (4): 140–147.
2. Agus, F., Farida., and M. van Noordwijk. 2004. Hydrological impacts of forest, agroforestry and upland cropping as a basis for rewarding environmental service providers in Indonesia. In A Workshop Proceeding. Padang/Singkarak, West Sumatra, Indonesia, 25–28 February 2004. Bogor: World Agroforestry Centre.
3. Amaruzaman, S., M. Isnurdiansyah, B. Nugraha, B. Lusiana, and Leimona. 2021. Profile of the production landscape of Pagar Alam: towards sustainable upland agriculture. Bogor, Indonesia: World Agroforestry (ICRAF) Indonesia Country Program.
4. Andriyani, I., D. Jourdain, B. Lidon, P. Soni, and B. Kartiwa. 2017. Upland farming system erosion yields and their constraints to change for sustainable agricultural conservation practices: A case study of land use and land cover (LULC) change in Indonesia. Land Degradation & Development 28: 421–430.
5. Arsanti, I.W., and M.H. Böhme. 2015. Assessing vegetable cropping patterns in upland areas of Indonesia. Acta Horticulture 794: 37–42.