Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Iinuma Hiroyuki and Kato Kazuzo,Relationship between the premature action potential and postextrasystolic potentiation.,Shinzo,0586-4488,Japan Heart Foundation,1975,7,14,1597-1605,https://cir.nii.ac.jp/crid/1390282680469464448,https://doi.org/10.11281/shinzo1969.7.14_1597