Pires, J. Norberto, Tiago Godinho, Klas Nilsson, Mathias Haage, and Christian Meyer. “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, no. 3 (August 7, 2007). Accessed April 24, 2024. https://online-journals.org/index.php/i-joe/article/view/421.