진화
NCBI/mweb21 - WWW Error 500 Diagnostic
http://www.ncbi.nlm.nih.gov/projects/mapview/map_search.cgi?taxid=9258책 찾기 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%ED%8A%B9%EC%88%98:%EC%B1%85%EC%B0%BE%EA%B8%B0/9783550087486리처드 도킨스 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%EB%A6%AC%EC%B2%98%EB%93%9C_%EB%8F%84%ED%82%A8%EC%8A%A4In the platypus a meiotic chain of ten sex chromosomes shares genes with the bird Z and mammal X chromosomes - Nature
https://dx.doi.org/10.1038%2Fnature03021디지털 객체 식별자 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%EB%94%94%EC%A7%80%ED%84%B8_%EA%B0%9D%EC%B2%B4_%EC%8B%9D%EB%B3%84%EC%9E%90
형태
Evolution of platypus venom revealed | COSMOS magazine
https://web.archive.org/web/20121105043922/http://www.cosmosmagazine.com/news/1423/evolution-platypus-venom-revealed
분류와 어원
Henry George Liddell, Robert Scott, A Greek-English Lexicon, πλα^τύ-πους
http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dplatu%2FpousHenry George Liddell, Robert Scott, A Greek-English Lexicon, πλα^τύς
http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dplatu%2FsHenry George Liddell, Robert Scott, A Greek-English Lexicon, πούς
http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dpou%2Fs