@article {203530,
	title = {Accurate Retardance and Birefringence Measurements of Mica Plates},
	journal = {Journal of Optics},
	volume = {35},
	year = {2006},
	pages = {164},
	author = {N. N. Nagib and Mahmoud, N.A. and M.M. Omar and L. Z. Ismail}
}
