@misc{miscdfe2a014,
title   = {An ontological model to blend didactic instruction and collaborative learning},
author = {Hayashi, Yusuke and Isotani, Seiji and Bourdeau, Jacqueline and Mizoguchi, Riichiro},
year = {2011},
doi = {10.1007/978-3-642-23801-7_1},
publisher = {Springer},
booktitle   = {International Conference Collaboration Research International Working Group - CRIWG}
}