1. E. Denme, Visions in math.
https://mathvis.academic.wlu.edu/2016/02/29/schwarz-p-surface-the-math
. Accessed 4 Oct 2018
2. H.A. Schwarz, Gesammelte Mathematische Abhandlungen, vol. 1 (Julius Springer, Berlin, 1890)
3. A.H. Schoen, Infinite periodic minimal surfaces without self-intersections. NASA Technical Note TN D-5541, 1970
4. A. Weyhaupt, 3-D printing software [online].
https://plus.maths.org/content/-meet-gyroid
. Accessed 11 Oct 2018
5. C.W. Hull, US Patent 4575330. Apparatus for production of three-dimensional objects by stereolithography (Date of patent: 11 Mar 1986)