Dücker, M., Wolfgang Müller, and Jessica Rubart. “VIPspace - A Visually Programmable Shared Workspace.”https://doi.org/10.1109/VL.1998.706150__In https://doi.org/10.1109/VL.1998.706150__Proceedings. 1998 IEEE Symposium on Visual Languages . Halifax, NS, Canada , 1998.https://doi.org/10.1109/VL.1998.706150 .