diff --git a/docs/refs.bib b/docs/refs.bib
index a7e9b603a..c5af09e55 100644
--- a/docs/refs.bib
+++ b/docs/refs.bib
@@ -22,6 +22,7 @@ @book{rasmussen2006gaussian
   number    = {3},
   year      = {2006},
   publisher = {MIT press Cambridge, MA}
+  doi       = {10.7551/mitpress/3206.001.0001}
 }
 
 % Venue corrected 2026-08: this is a UAI 2013 paper, not AISTATS. Verified against