1. 5) G. Crivellone, A. Fuganti, C. Mus and D. Salinas: SAE Technical Paper 2001-01-0402.
2. 6) P. Krug, M. Kennedy and J. Foss: SAE Technical Paper 2006-01-0983.
3. 8) T. Takami, M. Fujine, S. Kato, H. Nagai, A. Tsujino, Y. Masuda and M. Yamamoto: SAE Technical Paper 2000-01-1231.
4. 18) Y.-G. Kim, S.-W. Choi, J.-W. Cho, S.-W. Min, S.-J. Kim and B.-J. Jung: SAE Technical Paper 2014-01-0998.
5. 20) K. Nakazawa, H. Mitsui, K. Kakegawa, Y. Murakami, T. Ishikawa and R. Yauchibara: SAE Technical Paper 982675, (1998).