diff --git a/studies/Ribes_nigrum_transcriptome/README.md b/studies/Ribes_nigrum_transcriptome/README.md
index 29970e4bade6304ccc7a498a10114260a0a393a0..c1e6abc633f5b3879c60594abb49a997f73ec42d 100644
--- a/studies/Ribes_nigrum_transcriptome/README.md
+++ b/studies/Ribes_nigrum_transcriptome/README.md
@@ -5,4 +5,6 @@ A greenhouse experiment was performed to investigate the influence of drought st
 
 
 
-![](./protocols/greenhouse_drought_experiment.png)
\ No newline at end of file
+![](./protocols/greenhouse_drought_experiment.png)
+
+Figure from [Ziegler et al. 2024](https://doi.org/10.1093/hr/uhae313)
\ No newline at end of file