1. L. (Tex) Leugner, Maintenance Technology Internation, Inc., Natural gas engine lubrication and oil analysis—a primer in predictive maintenance and condition monitoring, Practicing Oil Analysis Magazine, September 2003.
2. H.M. Abi-Akar, A Test method to evaluate high temperature corrosion, Paper No. 00530, Corrosion 2000, NACE International Annual Meeting, Houston, TX, 2000.
3. A study on spark plug electrode shape;Nishio;Int. J. Vehicle Des.,1994
4. PGM-alloys as corrosion-resistant high-temperature materials;Kock;Ber. Bunsenges. Phys. Chem.,1998