?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ferguson&rft.au=Ferguson%2C+L&rft.aufirst=L&rft.volume=10&rft.atitle=Ancient+Expansion+of+the+Hox+Cluster+in+Lepidoptera+Generated+Four+Homeobox+Genes+Implicated+in+Extra-Embryonic+Tissue+Formation&rft.issue=10&rft.date=23+October+2014&rft.title=PLOS+Genetics&rft.genre=article