lass="external text" href="http://www.edu.joensuu.fi/eno/documents/global4.pdf">Water pollution in the hydroelectric power plants area</a></span></li>
<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://dambaspb.ru">[Saint Petersburg Dam</a> official site <span class="languageicon" style="font-size:0.95em; font-weight:bold; color:#555;">(Russian)</span></span></li>
<li id="cite_note-gl