List K Perspectors. Points available at the Kimberling's Encyclopedia ETC. The ETC version: The 5549 points version of 2013. The "Discoverer" database version: October 2013. Last update: 2014-04-12 Prespector of the Yff Central Triangle and Triangle ABC. Perspector and Homothetic Center of the Yff Central Triangle and the Intouch Triangle. Perspector and Homothetic Center of the Yff Central Triangle and the Excentral Triangle. Perspector and Homothetic Center of the Yff Central Triangle and the Half-Cevian Triangle of the Nagel Point. Prespector of the Yff Central Triangle and the External Moses Triangle of the Mixtilinear Incircles and the Excentral Circle of the Excentral Triangle.