span> <span class="reference-text"><a rel="nofollow" class="external free" href="http://www.theaerodrome.com/aces/australi/simpson2.php">http://www.theaerodrome.com/aces/australi/simpson2.php</a> Retrieved on 6 December 2011.</span></li>
<li id="cite_note-Abovethe-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Abovethe_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Abovethe_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Abovethe_2-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-