@article{ESOP-J-1992-Henglein94,
	author        = "Fritz Henglein",
	doi           = "10.1016/0167-6423(94)00004-2",
	journal       = "{Science of Computer Programming}",
	number        = 3,
	pages         = "197--230",
	title         = "{Dynamic Typing: Syntax and Proof Theory}",
	volume        = 22,
	year          = 1994,
}