Haghighatkhah, P., W. . Meulemans, B. Speckmann, J. Urhausen, and K. Verbeek. “Obstructing Classification via Projection”. Computing in Geometry and Topology, vol. 1, no. 1, Oct. 2022, pp. 2:1-2:21, doi:10.57717/cgt.v1i1.8.