1. Penetrante BM, Hsiao MC, Merritt BT, Vogtlin GE, Wan CZ, Rice GW, Voss KE (1997) Proceeding of the diesel engine emissions reduction workshop
2. Penetrante BM, Brusasco RM, Merritt BT, Pitz WJ, Vogtlin GE, Kung MC, Wan CZ, Voss KE (1999) Society of Automotive Engineers paper 982508
3. Kim HH, Takashima K, Katsura S, Mizuno A (2001) J Phys D:Appl Phys 34:604
4. Hoard J (2001) Society of Automotive Engineers paper 01FL-63
5. Hammer T (2002) Plasma Sources Sci Technol 11:A196