External representations for collaborative learning and assessment. - Sadhana Puntambekar; Agnes Stylianou; Daniel D. Suthers; Christopher D. Hundhausen; Teresa Hübscher-Younger (CSCL, 2002)

Improving Navigation and Learning in Hypertext Environments With Navigable Concept Maps. - Sadhana Puntambekar; Agnes Stylianou; Roland Hübscher (Hum. Comput. Interact., 2003)

Supporting Middle School Students Use Nonlinear Science Texts in an Inquiry Classroom. - Agnes Stylianou; Sadhana Puntambekar (ICLS, 2004)