Schipper, Roel, Chris Borg Costanzi, Freek Bos, Zeeshan Ahmed, and Rob Wolfs. “Double Curved Concrete Printing: Printing on Non-Planar Surfaces”. SPOOL 4, no. 2 (December 25, 2017): 17–21. Accessed January 6, 2026. https://spool.ac/index.php/spool/article/view/59.