D. . Tresukosol, O. . Sriyudhasak, P. . Panchavinnin, and R. . Phankingthongkum, “Nadroparin and Percutaneous Transluminal Coronary Angioplasty in Elderly Thais with Unstable Angina”, Siriraj Med J, vol. 57, no. 8, pp. 313–318, Aug. 2005.