@misc{Becker1998, author = {Roland Becker}, title = {Zinc-dithialkyldithiophosphates in engine oils - Determination of Conent, Composition and Degradation during Operation using Gas and Liquid Chromatography}, booktitle = {11th International Colloquium Tribology, Industrial and Automotive Lubrication}, type = {lecture}, year = {1998}, }