"Optimized E.F.I. for Natural Gas Fueled Engines" SAE Technical Paper 911650, Aug. 1991 N. John Beck, W. P. Johnson and Peter W. Peterson. |
"Cylinder Cutoff of 4-Stroke Cycle Engines at Part-Load and Idle" SAE Technical Paper 820156, Feb. 1982 Eiichi Watanabe and Itaru Fukutani. |
"Dual Fuel Natural Gas/Diesel Engines: Technology, Performance, and Emissions" (940548), Jan. 1994 Christopher S. Weaver and Sean H. Turner. |
"Improvement of Exhaust Emissions from a Two-Stroke Engine by Direct Injection System" (930497) Huei-Huay Huang, Ming-Horng Jeng, Nien-Tzu Chang, Yue-Yin Peng, James H. Wang and Wei-Li Chiang; Jan. 1993. |