1. Jean-Charles Faugère, Guillaume Moroz, Fabrice Rouillier, and Mohab Safey El Din, Classification of the perspective-three-point problem, discriminant variety and real solving polynomial systems of inequalities, in ISSAC '08: International Symposium on Symbolic and Algebraic Computation, ACM, New York, NY, USA, 2008, pp. 79–86.[doi]