diff --git a/README.md b/README.md
index 0def437..d9cb623 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,9 @@ In summary, the package is split into four parts:
 ## References 
 To reference this repository please use the below citations.
 
+> [Quantification of vascular networks in photoacoustic mesoscopy](https://www.biorxiv.org/content/10.1101/2021.11.22.469541v1)<br>
+> Emma L. Brown, Thierry L. Lefebvre, Paul W. Sweeney et al.
+
 > [Multiscale Topology Characterises Dynamic Tumour Vascular Networks](https://arxiv.org/abs/2008.08667)<br>
 > Bernadette J, Stolz et al.