diff --git a/paper.bib b/paper.bib
index 932fccf9..3dd29fec 100644
--- a/paper.bib
+++ b/paper.bib
@@ -199,4 +199,13 @@ @article{wieczorek2018shtools
   pages={2574--2592},
   year={2018},
   publisher={Wiley Online Library}
-}
\ No newline at end of file
+}
+
+@incollection{koch2020luh,
+  title={LUH-GRACE2018: a new time series of monthly gravity field solutions from GRACE},
+  author={Koch, Igor and Flury, Jakob and Naeimi, Majid and Shabanloui, Akbar},
+  booktitle={Beyond 100: The Next Century in Geodesy: Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019},
+  pages={67--75},
+  year={2020},
+  publisher={Springer}
+}