Chen, Y. T., Cheng, K. S., Chien, M. L., & Liu, J. K. (2000). Feature Curves Based Cephalometric Superimposition. Journal of Medical and Biological Engineering, 20(4), 211-218. https://www.airitilibrary.com/Article/Detail?DocID=16090985-200012-20-4-211-218-a
BREMNER, A. (2000). AN INTERESTING FAMILY OF CURVES OF GENUS 1. International Journal of Mathematics and Mathematical Sciences, 2000(), 431-434-052. https://doi.org/10.1155/S0161171200002210