Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Maria Byrne and Yoko Nakajima and Francis C. Chee and Robert D. Burke,Apical organs in echinoderm larvae: insights into larval evolution in the Ambulacraria,Evolution & Development,1520-541X,Wiley,2007-09,9,5,432-445,https://cir.nii.ac.jp/crid/1363670321304417152,https://doi.org/10.1111/j.1525-142x.2007.00189.x