Effects of an individual's prior knowledge on collaborative knowledge construction and individual learning outcomes in videoconferencing. - Bernhard Ertl; Birgitta Kopp; Heinz Mandl (CSCL, 2005)

Fostering argumentation with script and content scheme in videoconferencing. - Birgitta Kopp; Heinz Mandl (CSCL, 2007)

Supporting Learners Collaborative Knowledge Construction by External Representations. - Bernhard Ertl; Birgitta Kopp; Heinz Mandl (Knowledge Construction in E-learning Context, 2008)

Collaborative Online Learning: A Heterogeneous Phenomenon. - Birgitta Kopp; Heinz Mandl (Knowledge Construction in E-learning Context, 2008)

Supporting learning using external representations. - Bernhard Ertl; Birgitta Kopp; Heinz Mandl (Comput. Educ., 2008)

Collaborative learning in virtual seminars: analyzing learning processes and learning outcomes. - Birgitta Kopp; Katharina Schnurer; Heinz Mandl (CSCL (1), 2009)

Case-based learning in a virtual professional training - Collaborative problem solving activities and outcomes. - Birgitta Kopp; Melanie Hasenbein; Heinz Mandl (CSCL, 2011)

E-Tutorial Support for Collaborative Online Learning: Differences between experienced and non-experienced E-tutors. - Birgitta Kopp; Maria Cristina Matteucci; Carlo Tomasetto; Heinz Mandl (CSCL, 2011)

E-tutorial support for collaborative online learning: An explorative study on experienced and inexperienced e-tutors. - Birgitta Kopp; Maria Cristina Matteucci; Carlo Tomasetto (Comput. Educ., 2012)

Evaluating Virtual Collaboration Over Time - A Pilot Field Study. - Birgitta Kopp; Heinz Mandl (CSCL (2), 2013)

Case-based learning in virtual groups - collaborative problem solving activities and learning outcomes in a virtual professional training course. - Birgitta Kopp; Melanie Hasenbein; Heinz Mandl (Interact. Learn. Environ., 2014)