| :ref:hoppe2000distributed | Hoppe, H. U., Gaßner, K., Mühlenbrock, M., & Tewissen, F. (2000). Distributed visual language environments for cooperation and learning: Applications and intelligent support. Group Decision and Negotiation. Springer. |
| :ref:hoppe2002integrating | Hoppe, H. U., & Gaßner, K. (2002). Integrating collaborative concept mapping tools with group memory and retrieval functions. Proceedings of the Conference on Computer Support for Collaborative Learning: Foundations for a CSCL Community. |
| :ref:hoppe2000distributed | Hoppe, H. U., Gaßner, K., Mühlenbrock, M., & Tewissen, F. (2000). Distributed visual language environments for cooperation and learning: Applications and intelligent support. Group Decision and Negotiation. Springer. |
| :ref:hoppe2002integrating | Hoppe, H. U., & Gaßner, K. (2002). Integrating collaborative concept mapping tools with group memory and retrieval functions. Proceedings of the Conference on Computer Support for Collaborative Learning: Foundations for a CSCL Community. |
