Coenders, J., M. Mathot, P. Martens, F. Bos, R. Wolfs, A. Rolvink, and P. Middelkoop. “Optimizing 3D Concrete Printing: Exploring Potentials and Limitations of Materials and Production”. SPOOL, vol. 4, no. 2, Dec. 2017, pp. 27-31, doi:10.7480/spool.2017.2.1923.