@article {Willeke1992,
	title = {A simple and effective light trapping technique for polycrystalline silicon solar cells},
	journal = {Solar Energy Materials and Solar Cells},
	volume = {26},
	number = {4},
	year = {1992},
	pages = {345 - 356},
	issn = {0927-0248},
	doi = {DOI: 10.1016/0927-0248(92)90054-S},
	url = {http://www.sciencedirect.com/science/article/B6V51-47XG9S8-45/2/acfac830ed036bd52484e2951d6f9c51},
	author = {G. Willeke and H. Nussbaumer and H. Bender and E. Bucher}
}
