Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Daniel J. Drucker,Advances in oral peptide therapeutics,Nature Reviews Drug Discovery,1474-1776,Springer Science and Business Media LLC,2019-12-17,19,4,277-289,https://cir.nii.ac.jp/crid/1361137043994376576,https://doi.org/10.1038/s41573-019-0053-0