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@@ -81,4 +81,8 @@ This method of detecting the solar limb is demonstrated in Pötzi et al. Kanzelh
 
 With the method originating in:
 
-Taubin, G. Estimation of Planar Curves, Surfaces, and Nonplanar Space Curves Defined by Implicit Equations with Applications to Edge and Range Image Segmentation. IEEE Transactions on Pattern Analysis and Machine Intelligence 13, no. 11 (November 1991): . https://doi.org/10.1109/34.103273.
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+Taubin, G. Estimation of Planar Curves, Surfaces, and Nonplanar Space Curves Defined by Implicit Equations with Applications to Edge and Range Image Segmentation. IEEE Transactions on Pattern Analysis and Machine Intelligence 13, no. 11 (November 1991): . https://doi.org/10.1109/34.103273.
+
+For the removal of the limb-darkening effect, we use the constants values presented in:
+
+Cox, Arthur N., ed. Allen's Astrophysical Quantities. New York, NY: Springer, 2002. https://doi.org/10.1007/978-1-4612-1186-0.
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