@inproceedings{ESOP-2006-SummersB,
	author        = "Alexander J. Summers and Steffen van Bakel",
	booktitle     = "{Proceedings of the 15th European Symposium on Programming}",
	doi           = "10.1007/11693024_7",
	editor        = "Peter Sestoft",
	isbn          = "3-540-33095-X",
	pages         = "84--99",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Approaches to Polymorphism in Classical Sequent Calculus}",
	volume        = 3924,
	year          = 2006,
}