@inproceedings{ICFP-2011-CastagnaX,
	author        = "Giuseppe Castagna and Zhiwu Xu",
	booktitle     = "{Proceedings of the 16th International Conference on Functional Programming}",
	doi           = "10.1145/2034773.2034788",
	editor        = "Manuel M. T. Chakravarty and Zhenjiang Hu and Olivier Danvy",
	isbn          = "978-1-4503-0865-6",
	pages         = "94--106",
	publisher     = "{ACM}",
	title         = "{Set-theoretic foundation of parametric polymorphism and subtyping}",
	year          = 2011,
}