Evaluating Hypermedia and Learning: Methods and Results from the Perseus Project.

Gary Marchionini Gregory Crane Evaluating Hypermedia and Learning: Methods and Results from the Perseus Project. 5-34 1994 12 ACM Trans. Inf. Syst. 1 http://doi.acm.org/10.1145/174608.174609 db/journals/tois/tois12.html#MarchioniniC94