Map of the Drake Passage area. Source: Ivanov, L. and N. Ivanova.  <i>Antarctic: Nature, History, Utilization, Geographic Names and Bulgarian Participation</i>.  Sofia: Manfred Wörner Foundation, 2014. 368 pp. (in Bulgarian) <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-619-90008-1-6" title="Special:BookSources/978-619-90008-1-6">ISBN 978-619-90008-1-6</a>
<a href="//commons.wikimedia.org/wiki/User:Apcbg" title="User:Apcbg">Apcbg</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>