diff --git a/source/.references.bib.un~ b/source/.references.bib.un~
index 0aab554..fab5e05 100644
Binary files a/source/.references.bib.un~ and b/source/.references.bib.un~ differ
diff --git a/source/references.bib b/source/references.bib
index cd59389..fc00096 100644
--- a/source/references.bib
+++ b/source/references.bib
@@ -74,14 +74,6 @@ @article{Jibson1993
   year={1993}
 }
 
-@article{Newmark1965,
-  title={Effects of earthquakes on dams and embankments},
-  author={Newmark, N. M},
-  journal={Geotechnique},
-  volume={15},
-  number={2},
-  pages={139-160},
-  year={1965},
-}
+
 
 
diff --git a/source/references.bib~ b/source/references.bib~
index 0a1751c..cd59389 100644
--- a/source/references.bib~
+++ b/source/references.bib~
@@ -65,4 +65,23 @@ title = {Geotechnical Earthquake Engineering},
 year = {1996}
 }
 
+@article{Jibson1993,
+  title={Predicting Earthquake-Induced Landslide Displacements Using Newmark’s Sliding Block Analysis},
+  author={Randall W. Jibson},
+  journal={Transportation Research Record},
+  volume={1411},
+  pages={17 p},
+  year={1993}
+}
+
+@article{Newmark1965,
+  title={Effects of earthquakes on dams and embankments},
+  author={Newmark, N. M},
+  journal={Geotechnique},
+  volume={15},
+  number={2},
+  pages={139-160},
+  year={1965},
+}
+