P. de Haller. "ACTIVE CERAMIC COATINGS AND THEIR APPLICATIONS IN VW 1,9 TDI ENGINE." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Energy and Clean Technologies (2018): 97-102. https://doi.org/10.5593/sgem2018/4.1/s17.013