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2. Swedish Maritime Administration „Information on application procedures, technical descriptions and conditions for qualifying for environmental differentiated fairway dues“
3. Bastenhof, D.: SEMT Pielstick „Moteur Diesel de demain: vers un nouvel equilibre“. Conference ATEE-Parts, June 1997
4. Rosén P.; Olsson L.O.: „A Novel Technique of Reducing NOx emissions with an Efficiency increase of Turbo-Charged Diesel Engines by Means of Humidification of the Compressed Air“. Proceedings of ECOS 1996, Stockholm, Sweden, June 1996