Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Michael D. Winniford and Kay L. Fulton and L. David Hills,"Long-term therapy of paroxysmal supraventricular tachycardia: A randomized, double-blind comparison of digoxin, propranolol and verapamil",The American Journal of Cardiology,0002-9149,Elsevier BV,1984-11,54,8,1138-1139,https://cir.nii.ac.jp/crid/1360013248596374400,https://doi.org/10.1016/s0002-9149(84)80162-9