@article {mcgregor1965sequence,
	title = {A sequence of limiting distributions of response probabilities},
	journal = {Psychometrika},
	volume = {30},
	number = {4},
	year = {1965},
	pages = {491{\textendash}497},
	publisher = {Springer},
	author = {McGregor, JR and Zidek, J.V.}
}
