starfish, <i>Asterina pectinifera</i>, polar body formation (bulging) from an oocyte <br>The top side is the animal pole. Numbers shown are the time after the onset of the bulge formation. Scale bar, 50 µm.
Setsuko K. Satoh, Akifumi Tsuchi, Ryohei Satoh, Hiromi Miyoshi, Miyako S. Hamaguchi, Yukihisa Hamaguchi
CC BY-SA 4.0
<cite style="font-style:normal">Satoh, Setsuko K. (<span class="mw-formatted-date" title="2013-11-18">2013-11-18</span>). "<a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMCPMC3832532">The Tension at the Top of the Animal Pole Decreases during Meiotic Cell Division</a>". <i>PLOS ONE</i> <b>8</b> (11): e79389. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1371/journal.pone.0079389">10.1371/journal.pone.0079389</a>. <a href="https://en.wikipedia.org/wiki/PMID" class="extiw" title="w:PMID">PMID</a> <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/24260212">24260212</a>. <a href="https://en.wikipedia.org/wiki/PubMed_Central" class="extiw" title="w:PubMed Central">PMC</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMCPMC3832532">PMC3832532</a>. <a href="https://en.wikipedia.org/wiki/International_Standard_Serial_Number" class="extiw" title="en:International Standard Serial Number">ISSN</a> <a rel="nofollow" class="external text" href="https://www.worldcat.org/issn/1932-6203">1932-6203</a>.</cite>