Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KAPPELHOF JP,The ring of Soemmerring in the rabbit. A scanning electron microscopic study,Graefes Arch Clin Exp Ophthalmol,,,1985,223,,111-120,https://cir.nii.ac.jp/crid/1570854175040095744,