1. Food and Agriculture Organization of the United Nations, The Future of Food and Agriculture: Trends and Challenges, Rome, 2017, Available from: https://www.fao.org/3/i6583e/i6583e.pdf.
2. Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: effects of permeate chemistry;Damtie;Environ. Eng. Res.,2020
3. Y.V. Nancharaiah, S. Venkata Mohan, P.N.L. Lens, Recent advances in nutrient removal and recovery in biological and bioelectrochemical systems, Bioresour. Technol. 215 (2016) 173–185, doi: 10.1016/j.biortech.2016.03.129.
4. Sustainable Phosphorus Management: A Global Transdisciplinary Roadmap;Scholz,2014
5. S.J. Van Kauwenbergh, World Phosphate Rock Reserves and Resources, International Fertilizer Development Center (IFDC), Alabama, USA, 2010.