@inproceedings{inproceedingsc15dcb12,
title   = {Anchoring discussions in lecture: an approach to collaboratively extending classroom digital media},
author = {Abowd, Gregory D. and Pimentel, Maria da Graça Campos and Kerimbaev, Bolot and Ishiguro, Yoshihide and Guzdial, Mark},
year = {1999},
publisher = {Lawrence Erlbaum Associates},
booktitle   = {Conference on Computer Support for Collaborative Learning - CSCL}
}