1. A.N. Chigapov, A.A. Dubkov, B.P. Carberry, C.N. Montreuil, G.W. Graham, R.W. McCabe,W. Chun, EP Patent 1,374,978 (2004), to Ford Global Tech.
2. Z. Hu, P.L. Burk, S.F. Chen, US Patent 2,003,175,192 (2003), to Engelhard Co.
3. M. Deeba, J.K. Hochmuth, U. Dahle, S. Brandt, US Patent 2,003,039,597 (2003), to Engelhard Co.
4. D. Dou, M. Molinier, O. Bailey, WO Patent 2,001,056,686 (2001), to Delphi Technologies.
5. H.L. Fang, J.C. Wang, R.C. Yu, C.Z. Wan, K. Howden, Society of Automotive Engineers (SAE Papers), SP-1801 (Emissions: Advanced Catalyst and Substrates, Measurement and Testing, and Diesel Gaseous Emissions), 2003, p. 185.