@conference {71115,
	title = {Geometrical Optimization of Thermoacoustic Heat Engines,},
	booktitle = { AIAA-2011-0129, Orlando,},
	year = {2011},
	month = {January },
	address = {USA},
	author = {Essam E. Khalil and AbdelMaged Ibrahim and Nadin M Arafa}
}
