diff --git a/citations.bib b/citations.bib
index 8a61edf..505e1d3 100644
--- a/citations.bib
+++ b/citations.bib
@@ -5,6 +5,16 @@ @article{greifer2021choosing
   year={2021}
 }
 
+@article{lucy2022tipr,
+  title={tipr: An R package for sensitivity analyses for unmeasured confounders},
+  author={Lucy, D and McGowan, Agostino},
+  journal={Journal of Open Source Software},
+  volume={7},
+  number={77},
+  pages={4495},
+  year={2022}
+}
+
 @misc{Riederer_2020, 
   title={Column names as contracts}, 
   url={https://emilyriederer.netlify.app/post/column-name-contracts/},