diff --git a/paper/paper.bib b/paper/paper.bib
index 8ced2f3..0c059a9 100644
--- a/paper/paper.bib
+++ b/paper/paper.bib
@@ -55,6 +55,17 @@ @article{lazar2024
     url = {https://doi.org/10.1101/2024.10.02.616112}
 }
 
+@article{migueles2019,
+    title = {GGIR: A research community-driven open source {R} package for generating physical activity and sleep outcomes from multi-day raw accelerometer data},
+    author = {Migueles, Jairo H. and Rowlands, Alex V. and Huber, Florian and Sabia, Severine and van Hees, Vincent T.},
+    journal = {Journal for the Measurement of Physical Behavior},
+    volume = {2},
+    number = {3},
+    year = {2019},
+    doi = {10.1123/jmpb.2018-0063},
+    url = {https://doi.org/10.1123/jmpb.2018-0063}
+}
+
 @article{roguski2024,
     author = {Roguski, A and Needham, N and MacGillivray, T and Martinovic, J and Dhillon, B and Riha, RL and Armstrong, L and Campbell, IH and Ferguson, A and Hilgen, G and Lako, M and Ritter, P and Santhi, N and von Schantz, M and Spitschan, M and Smith, DJ},
     title = {Investigating light sensitivity in bipolar disorder ({HELIOS-BD})},