Simultaneous liquid-chromatographic determination of 3,4-dihydroxyphenylglycol, catecholamines, and 3,4-dihydroxyphenylalanine in plasma, and their responses to inhibition of monoamine oxidase - Eisenhofer, G; Goldstein, D S; Stull, R (Clin Chem, 1986)
et al.