Approved recommendation (1985) on IFCC methods for the measurement of catalytic concentration of enzymes. II. IFCC method for aspartate aminotransferase (L-aspartate:2-oxoglutarate aminotransferase, EC 2.6.1.1) - Bergmeyer, H; Horder, M; Rej, R (J Clin Chem Clin Biochem, 1986)