Marc Stadtler Rainer Bromme Dealing with multiple documents on the WWW: The role of metacognition in the formation of documents models. 191-210 2007 2 I. J. Computer-Supported Collaborative Learning 2-3 http://dx.doi.org/10.1007/s11412-007-9015-3 db/journals/cscl/cscl2.html#StadtlerB07