Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Jonathan T. Busada and Christopher B. Geyer,The Role of Retinoic Acid (RA) in Spermatogonial Differentiation1,Biology of Reproduction,0006-3363,Oxford University Press (OUP),2016-01-01,94,1,10,https://cir.nii.ac.jp/crid/1360292621585584000,https://doi.org/10.1095/biolreprod.115.135145