diff --git a/paper.bib b/paper.bib
index 08e597b..8fd5358 100644
--- a/paper.bib
+++ b/paper.bib
@@ -21,4 +21,12 @@ @misc{pappalardo2019scikitmobility
     eprint={1907.07062},
     archivePrefix={arXiv},
     primaryClass={physics.soc-ph}
-}
\ No newline at end of file
+}
+@misc{yabe2021location,
+      title={Location Data Reveals Disproportionate Disaster Impact Amongst the Poor: A Case Study of the 2017 Puebla Earthquake Using Mobilkit}, 
+      author={Takahiro Yabe and Nicholas K W Jones and Nancy Lozano-Gracia and Maham Faisal Khan and Satish V. Ukkusuri and Samuel Fraiberger and Aleister Montfort},
+      year={2021},
+      eprint={2107.13590},
+      archivePrefix={arXiv},
+      primaryClass={physics.soc-ph}
+}