3Frank Lin C, Nightingale S, Mamdan B, et al. Arandomized comparison of nifedipine and sodium nitroprasside in severe hypertension, Chest, 1986, 90:500.
4Mann T, Cohn PF, Holnkan BL, et al. Effect of nitroprusside on reginal myocardial blood flow in coronary artery disease Circulation, 1978, 57:732.
5Michael Me Carty. US NIH issues Waming on nifedipine. Lancet, 1995, 346:689.