^Karasik, Y. B.; Sharir, Micha (1993), "The power of geometric duality and Minkowski sums in optical computational geometry", in Yap, Chee (ed.), Proceedings of the Ninth Annual Symposium on Computational Geometry, San Diego, CA, USA, May 19–21, 1993, Association for Computing Machinery, pp. 379–388,
doi:
10.1145/160985.161168; see section 6, "Reporting all empty double wedges for a point set", p. 384