David A. Joyner Ashok K. Goel Spencer Rugaber Cindy E. Hmelo-Silver Rebecca Jordan Evolution of an Integrated Technology for Supporting Learning about Complex Systems. 257-259 2011 ICALT http://dx.doi.org/10.1109/ICALT.2011.80 conf/icalt/2011 db/conf/icalt/icalt2011.html#JoynerGRHJ11