Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MAK GS,Variations in Thebesian valve anatomy and coronary sinus ostium : Implications for invasive electrophysiology procedures,Europace,,,2009,11,,1136-1137,https://cir.nii.ac.jp/crid/1570572700879954560,