<i>Back in X year, one of the most widely cited studies [...]</i><p>I tried to find the "X year", a placeholder that was probably forgotten by the OP, and the source of the survey page contains the following snippet<p><pre><code> <meta name="DC.date.modified" content="2014-08-12T08:38:03+00:00"/>
<meta name="DC.date.created" content="2014-08-11T14:42:58+00:00"/></code></pre>