1. T.V. Johnson, SAE Technical Paper 2011-01-0304.
2. Urea-SCR: a promising technique to reduce NOx emissions from automotive diesel engines
3. H.Y. Chen, E.C. Weigert, J.M. Fedeyko, J.P. Cox, P.J. Andersen, SAE Technical Paper 2010-01-0302.
4. W. Li, K.L. Perry, K. Narayanaswamy, C.H. Kim, P. Najt, SAE Technical Paper 2010-01-0366.
5. C.L. DiMaggio, G.B., Fisher, K.M., Rahmoeller, M. Sellnau, SAE Technical Paper 2009-01-0277.