@conference {7144,
	title = {           "Porous silicon for solar cell efficiency improvement and optical applications" },
	booktitle = {The fifth international conference on scientific research and its applications, Cairo University, 22-24 December, 2009.  },
	year = {2009},
	month = {24 December},
	address = { Cairo University Giza, Egypt},
	author = {Waheed A. Badawy}
}
