diff --git a/text/bib-database.bib b/text/bib-database.bib
index 9fb983b8208feb5510f6f27d947affa420215aa6..8f170321a99f4f42e83dc69e2d866edb1cbf27be 100644
--- a/text/bib-database.bib
+++ b/text/bib-database.bib
@@ -449,4 +449,16 @@ pages={58-64},
   pages={114--125},
   year={1959},
   publisher={IBM}
+}
+
+% Following reference will overflow page, because the link cannot be broken into lines automatically. We can include package xurl (\usepackage{xurl}), which will break the line where it is needed.
+@misc{test,
+    author = {{Joe Black}},
+    title = {Foobar 1.0},
+    year = {1996},
+    month = {1},
+    url = {http://www.aaa.bb.cccc.dh/uploads/ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd.pdf},
+    urldate = {2011-03-02},
+    sortname = {Sun},
+    keywords = {www}
 }
\ No newline at end of file