1. FAO, Global agriculture towards 2050 in High Level Expert Forum «How to feed the world in 2050», Summary report Food and Agriculture Organization of the United Nations, Rome, 12-13 October 2009.
2. A comprehensive review on biodegradable polymers and their blends used in controlled-release fertilizer processes
3. Controlled-Release NPK Fertilizer Encapsulated by Polymeric Membranes
4. Materials for Sustained and Controlled Release of Nutrients and Molecules To Support Plant Growth
5. M.E. Trenkel, Use Efficiency Controlled-Release and Stabilized Fertilizers in Agriculture, International Fertilizer Industry Association, Second edition, Paris, 2010.