@article {mohsen1968higher,
	title = {Higher order asymptotic terms of the two-dimensional diffraction by a small aperture},
	journal = {Radio Science},
	volume = {3},
	year = {1968},
	note = {n/a},
	pages = {1105},
	abstract = {n/a},
	author = {Mohsen, A and Hamid, MAK}
}
