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2. Heywood, J.B. Internal Combustion Engine Fundamentals. McGraw-Hill: New York, 2001; 567-667.
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4. Jahnke, J.A. Industrial Extension Service, College of Engineering, North Carolina State University. Student Workbook: Source Sampling for Particulate Pollutants. APTI Course 450, 1995; Edition 3, A1–A38.