1 files changed, 19 insertions, 0 deletions
diff --git a/bibliography.bib b/bibliography.bib
index 5f6f478..ce2a1c5 100644
--- a/bibliography.bib
+++ b/bibliography.bib
@@ -1,3 +1,22 @@
+@inreference{eb-extinctions,
+    title={Major Mass Extinctions},
+    author={Dubey, Anna},
+    booktitle={Encyclopædia Brittanica},
+    publisher={Encyclopædia Brittanica, Inc},
+    date={2025-06-13},
+    url={https://www.britannica.com/list/major-mass-extinctions},
+    urldate={2026-06-10},
+}
+
+@inreference{oed-catastrophe,
+    title={catastrophe (n.)},
+    booktitle={Oxford English Dictionary},
+    doi={10.1093/OED/1027188634},
+    date={2026-06},
+    publisher={Oxford University Press},
+    address={Oxford},
+}
+
 @book{population-bomb,
     author={Erlich, Paul Ralph},
     title={The Population Bomb},