diff --git a/eoatex2imxml.py b/eoatex2imxml.py
index 57940b6..100a92e 100755
--- a/eoatex2imxml.py
+++ b/eoatex2imxml.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8; mode: python -*-
-# Time-stamp: <2018-08-24 17:17:19 (kthoden)>
+# Time-stamp: <2018-08-30 17:51:23 (kthoden)>
 
 """
 Converts Latex files into a customized DocBook XML file.
@@ -1417,7 +1417,11 @@ def cleanup():
                     strTitle = current_citation["title"]
 
             # [1:-1] to remove parentheses around citations
-            citeauthoryear_value = form_cit.select("#citeauthoryear ~ p > span[data-cites='%s']" % string_citekey)[0].text[1:-1]
+            try:
+                citeauthoryear_value = form_cit.select("#citeauthoryear ~ p > span[data-cites='%s']" % string_citekey)[0].text[1:-1]
+            except IndexError:
+                print("Could not find {}. Exiting.".format(string_citekey))
+                sys.exit()
             data_title_value = citeauthoryear_value
             if xmlCitation.tag == "EOAciteauthoryear":
                 strCitation = citeauthoryear_value