@article {778,
	title = {A comparison of the performance of simulated hierarchical and linear testlets},
	journal = {Journal of Educational Measurement},
	volume = {29},
	year = {1992},
	pages = {243-251},
	author = {Wainer, H., and Kaplan, B. and Lewis, C.}
}
@article {781,
	title = {Building algebra testlets: A comparison of hierarchical and linear structures},
	journal = {Journal of Educational Measurement},
	volume = {8},
	year = {1991},
	pages = {xxx-xxx},
	author = {Wainer, H., and Lewis, C. and Kaplan, B. and Braswell, J.}
}
@booklet {1554,
	title = {Some empirical guidelines for building testlets (Technical Report 91-56)},
	year = {1991},
	address = {Princeton NJ: Educational Testing Service, Program Statistics Research},
	author = {Wainer, H., and Kaplan, B. and Lewis, C.}
}
