@article{ESOP-J-1990-Reps91,
	author        = "Thomas W. Reps",
	doi           = "10.1016/0167-6423(91)90039-Z",
	journal       = "{Science of Computer Programming}",
	number        = "1-3",
	pages         = "139--215",
	title         = "{Algebraic Properties of Program Integration}",
	volume        = 17,
	year          = 1991,
}