1. Drugs: Part I, Section 977.30. In: Official Methods of Analysis of AOAC International,1990
2. Standard methods 3500-Zn. In: Standard Methods for the Examination of Water and Wastewater,1998
3. Determination of iron, a study of the o-Phenanthroline method;Bandemer;Industrial and Engineering Chemistry Analytical Edition,1944
4. Simple spectrophotometric determination of Fe in oxalate and HCl soil-extracts;Dominik;Talanta,2000
5. Direct determination of iron in malt beverages;Gray;Industrial and Engineering Chemistry Analytical Edition,1938