- Putrawan, I Dewa Gede Arsa., et all. "Agricultural wastes as renewable fillers in physical granulation of NPK fertilizers: Evaluation of on-size granules and comparison to conventional filler." International Journal of Recycling of Organic Waste in Agriculture, vol. 9, no. 2, pp. 119 - 135, https://doi.org/10.30486/ijrowa.2020.1889862.1018