Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TANAKA NORIYUKI,What is a species?,Acta Phytotaxonomica et Geobotanica,00016799,Japanese Society for Plant Systematics,1997,47,2,239-252,https://cir.nii.ac.jp/crid/1390282679419784064,https://doi.org/10.18942/bunruichiri.kj00001077560