1. Debarbat, S. 1986, IAU Commission 24 Working Group letter
2. Debarbat, S. & Guinot, B. 1970, La Methode des hauteurs egales en astronomie (Paris: Gordon & Breach)
3. IAU. 1998, IAU Inf. Bull., No. 81, 30
4. Li, D., Xu, J. & Luo, D. 1983, The Equal-Altitude Method and Its Application to Fundamental Astrometry (in Chinese) (Beijing: Sci. Press)