1. Fundamentals of Nitriding and Nitrocarburizing;Miteemeijer,2013
2. Plasma (Ion) Nitriding and Nitrocarburizing of Steels;Elwart,2013
3. Plasma Nitriding History and Processes, Northiest Coating Technologies
http://www.northeastcoating.com/products/plasma-nitriding/process
4. Plasma Nitriding Process, TPP Information Centre
http://www.tppinfo.com/heat_treatment/plasma_nitriding_coating/plasma_nitriding.htm