Pires, J. Norberto, Tiago Godinho, Klas Nilsson, Mathias Haage, and Christian Meyer. 2007. “Programming Industrial Robots Using Advanced Input-Output Devices: Test-Case Example Using a CAD Package and a Digital Pen Based on the Anoto Technology”. International Journal of Online and Biomedical Engineering (iJOE) 3 (3). https://doi.org/10.3991/ijoe.v3i3.421.