A Breath of Fresh Air: Alternative Approaches to Learning. - Surabhi Marathe; Lei Liu 057; Cindy E. Hmelo-Silver (ICLS, 2004)

How representation matters: comparing collaborative learning with alternative versions of hypermedia. - Lei Liu 057; Cindy E. Hmelo-Silver; Surabhi Marathe (CSCL, 2005)

Effects of Conceptual Representation on Learning from Hypermedia. - Lei Liu 057; Surabhi Marathe; Cindy E. Hmelo-Silver (ICLS, 2006)