@inproceedings{LICS-1988-BohmP,
	author        = "Corrado Böhm and Adolfo Piperno",
	booktitle     = "{Proceedings of the Third Annual Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.1988.5104",
	isbn          = "0-8186-0853-6",
	pages         = "91--101",
	publisher     = "{IEEE Computer Society}",
	title         = "{Characterizing X-Separability and One-Side Invertibility in λ-β-Ω-Calculus}",
	year          = 1988,
}