“Experimental Investigation of Preheated Air Effects With Multi-Line of Fuel Injection (LPG) on a Tubular Combustor of Micro Gas Turbine”. Journal of University of Babylon for Engineering Sciences, vol. 26, no. 9, Oct. 2018, pp. 56-68, https://journalofbabylon.com/index.php/JUBES/article/view/1703.