diff --git a/binarycpython/utils/grid.py b/binarycpython/utils/grid.py
index c591cbf007babf3f2b0d4bc95f049ecd5b7183e7..40962186a3a2b73e0cf1b7d52a2b39f5c2654b19 100644
--- a/binarycpython/utils/grid.py
+++ b/binarycpython/utils/grid.py
@@ -4779,6 +4779,7 @@ eccentricity3=0
         grid_options['multiplicity_fraction_function'] will be checked for the choice
 
         TODO: add option to put a manual binary fraction in here (solve via negative numbers being the functions)
+        TODO: add binary fraction of https://iopscience.iop.org/article/10.3847/1538-4357/ab0d88, https://arxiv.org/pdf/2111.13700.pdf
         """
 
         # Just return 1 if no option has been chosen