@article{pub4369,
author = {
Ullrich, Carsten
and
Melis, Erica
},
title = {Pedagogically founded courseware generation based on HTN-planning},
year = {2009},
month = {7},
volume = {36},
number = {5},
pages = {9319--9332},
journal = {Expert Systems with Applications},
publisher = {Pergamon Press, Inc.},
note = {RB=yes}
}