Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sakai Yasuo,"After-treatment for Exhaust Gas Emission Reduction : The State of the Art of Oxidation Catalyst, NOx Reduction and Particulate Trap, and Those Future Prospect",Journal of the Society of Mechanical Engineers,00214728,The Japan Society of Mechanical Engineers,1992,95,882,405-409,https://cir.nii.ac.jp/crid/1390001205928459392,https://doi.org/10.1299/jsmemag.95.882_405