@article {3536,
	title = {Structured Program Lookahead},
	journal = {Computer Languages, Systems \& Structures},
	volume = {12},
	year = {1987},
	pages = {95--108},
	doi = {10.1016/0096-0551(87)90002-6},
	author = {Thomas Strothotte and Gordon Cormack}
}
