Quantifying the amount of restraining due to friction in the different areas of drawing tools: A numerical analysisEneko Saenz-de-Argandona, Alaitz Zabala, Ainhoa Guinea, Daniel Cañizares and Joseba MendigurenMATEC Web Conf., 408 (2025) 02003DOI: https://doi.org/10.1051/matecconf/202540802003