Przybyła, Grzegorz, Stefan Postrzednik, and Zbigniew Żmudka. “ The Heat Transfer Coefficient Calculations of Internal Combustion Engine Fuelled With Natural Gas”. Advances in Mechanical and Materials Engineering 32, no. 291 (1) (April 10, 2015): 71-80. Accessed April 12, 2025. https://journals.prz.edu.pl./amme/article/view/1436.