Ahmed, Mohammed Jamaluddin, et al. “A Highly Sensitive and Rapid Spectrophotometric Method for the Determination of Molybdenum at Nano-Trace Levels in Some Real, Environmental, Biological, Food and Soil Samples Using Salicylaldehyde-Benzoylhydrazone”. European Journal of Chemistry, vol. 11, no. 1, Mar. 2020, pp. 37-49, doi:10.5155/eurjchem.11.1.37-49.1923.