@article{ICFP-2017-IgarashiSI,
	author        = "Yuu Igarashi and Taro Sekiyama and Atsushi Igarashi",
	doi           = "10.1145/3110284",
	journal       = "{Proceedings of the ACM on Programming Languages}",
	number        = "ICFP",
	pages         = "29",
	title         = "{On polymorphic gradual typing}",
	volume        = 1,
	year          = 2017,
}