Sicam, V.A., Flores, A. and Salumbides, E.J. 2003. Zernike polynomial fitting algorithm used in corneal topography. Proceedings of the Samahang Pisika ng Pilipinas, 21(1), SPP-2003-2A-01. URL: https://proceedings.spp-online.org/article/view/SPP-2003-2A-01.