@article {1993,
	title = {Visions of Purgatory and their Role in the Bonum universale de apihus of Thomas of Cantimpr{\'e}},
	journal = {Ons Geestelijk Erf},
	volume = {67},
	year = {1993},
	pages = {20-33},
	author = {Sweetman, Robert}
}
