@article {204567,
	title = {Optical Spectroscopic Study of Hard Ultraviolet Protection Sunglasses},
	journal = {Nonlinear optics quantum optics concepts in modern optics},
	volume = {51},
	year = {2020},
	pages = {171-193},
	author = {Y. H. Elbashar and W. A. Rashidy and J. A. Khaliel and D.I. Moubarak and A.S. Abdel-Rahaman and H.H. Hassan}
}
