1. Abdulla M, Haeger-Aronsen B, Svensson S (1976) Effect of ethanol and zinc on ALA dehydratase activity in red blood cells. Enzyme 21: 248
2. Alessio L, Castoldi MR, Odone P, Franchini I (1981) Behaviour of indicators of exposure and effect after cessation of occupational exposure to lead. Br J Ind Med 38: 262
3. Berk PD, Tschudy DP, Shepley LA, Waggoner JG (1970) Hematologic and biochemical studies in a case of lead poisoning. Am J Med 48: 139
4. Berlin A, Schaller KH (1974) European standardized method for the determination of ?-aminolevulinic acid dehydratase activity in blood. J Clin Chem Clin Biochem 12: 389
5. Bevan DR, Bodlaender P, Shemin D (1980) Mechanism of porphobilinogen synthase. Requirement of Zn2+ for enzyme activity. J Biol Chem 255: 2030