@booklet {galal_grounded_1999,
	title = {A {Grounded}, {Extensible} {Requirements} {Model}},
	number = {RN/99/49},
	year = {1999},
	note = {n/a},
	month = {jan},
	publisher = {Department of Computer Science, University College London},
	type = {Research {Note}},
	abstract = {n/a},
	author = {Galal, Galal H and McDonnell, Janet T}
}
