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@@ -5,4 +5,10 @@ meas_extensions_shapeHSM
 ``meas_extensions_shapeHSM`` is a package in the `LSST Science Pipelines <https://pipelines.lsst.io>`_.
 
 The ``lsst.meas.extensions.shapeHSM`` Python module provides algorithms for HSM shape measurement.
+The algorithm was initially described in https://ui.adsabs.harvard.edu/abs/2003MNRAS.343..459H/abstract,
+and was modified later in https://ui.adsabs.harvard.edu/abs/2005MNRAS.361.1287M/abstract.
+HSM is named after the primary authors: i) Hirata, Christopher, ii) Seljak, Uros and iii) Mandelbaum, Rachel.
+Their implementation of this algorithm lives within `GalSim <https://github.com/GalSim-developers/GalSim>`_,
+and this package interacts directly with the C++ layer of GalSim to make the measurements.
+
 Documentation is available at https://pipelines.lsst.io/modules/lsst.meas.extensions.shapeHSM/index.html.