Add missing reference in about

Change-Id: Ic41c855a590a59791b3aeb3e5fe3f7c4bddfb5c3
diff --git a/templates/en/about.html.ep b/templates/en/about.html.ep
index f597d59..9842776 100644
--- a/templates/en/about.html.ep
+++ b/templates/en/about.html.ep
@@ -3,7 +3,7 @@
     DeReKoVecs (Fankhauser & Kupietz 2022, 2017, 2019; Kupietz et al. 2018) is the new open lab of the Corpus Linguistics group at IDS Mannheim. Similar to the
     Collocation Database <a href="http://corpora.ids-mannheim.de/">CCDB</a> (Keibel &amp; Belica 2007, Belica 2011), DeReKoVecs serves for investigating and comparing
     of measurements, dimension reduction procedures, visualizations etc., to track down detailed paradigmatic and syntagmatic relations
-    between words based on their use in very large corpora such as the German Reference Corpus DeReKo (Kupietz et al. 2010, 2018) or the Reference Corpus of the Contemporary Romanian Language CoRoLa (Barbu Mititelu et al. 2018).
+    between words based on their use in very large corpora such as the German Reference Corpus DeReKo (Kupietz et al. 2010, 2018) or the Reference Corpus of the Contemporary Romanian Language CoRoLa (Barbu Mititelu et al. 2018, Cristea et al. 2017).
 </p>
 <p>
     The models used here are based on an extension of word2vec (Mikolov et al. 2013), wang2vec (Ling et al. 2015)