@article {148817,
	title = {Propagation of high and low graded-index waveguides in an inhomogeneous-dispersive medium},
	journal = {Superlattices and Microstructures},
	volume = {111},
	year = {2017},
	pages = {991-999},
	author = {H.I. Abdel-Gawad and Tantawy, M.}
}
