diff --git a/topics/fair/tutorials/fair-metadata/tutorial.bib b/topics/fair/tutorials/fair-metadata/tutorial.bib
index 48bd23ddcb6586..b7d32dcdb2d152 100644
--- a/topics/fair/tutorials/fair-metadata/tutorial.bib
+++ b/topics/fair/tutorials/fair-metadata/tutorial.bib
@@ -18,11 +18,4 @@ @article{Sarkans2021
   year = {2021},
   month = may,
   pages = {1418–1422}
-}
-
-@online{diseaseontology,
-  author = {Disease Ontology},
-  title = {The Disease Ontology is a formal ontology of human disease.},
-  url = {https://disease-ontology.org/?id=DOID:9352},
-  urldate = {2024-03-15}
 }
\ No newline at end of file
diff --git a/topics/fair/tutorials/fair-origin/tutorial.bib b/topics/fair/tutorials/fair-origin/tutorial.bib
index e8c877e5ce88a3..c86b16a3661c7f 100644
--- a/topics/fair/tutorials/fair-origin/tutorial.bib
+++ b/topics/fair/tutorials/fair-origin/tutorial.bib
@@ -26,4 +26,4 @@ @article{Cox2021
   year = {2021},
   month = jun,
   pages = {e1009041}
-}
+}
\ No newline at end of file