1. Martindale, The Extra Pharmacopoeia, 31st ed., The Royal Pharmaceutical Society.
2. 2-[N-(S)-1-Ethoxycarbonyl-3-phenylpropyl]-l-alanyl]-(1S,3S,5S)-2-azabicyclo[3.3.0]octane-3-carboxylic acid (HOE 489)- a new and highly effective angiotensin I converting enzyme inhibitor;Metzger;Arzneim. Forsch. (Drug Res.),1984
3. Humoral and blood pressure effects of the angiotensin converting enzyme inhibitor ramipril in essential hypertension;Lenz;Arzneim. Forsch. (Drug Res.),1986
4. A dose-response study of HOE 498, a new non-sulphydryl converting enzyme inhibitor, on blood pressure, pulse rate and the renin–angiotensin–aldosterone system in normal man;Manheim;Br. J. Clin. Pharmacol.,1985
5. High-performance liquid chromatography with photochemical fluorimetric detection of tryptophan based on 4-fluoro-7-nitrobenzo-2-oxa-1,3-diazole;Imai;Anal. Chim. Acta,1988