Maroo, Usha, Kavita Sharma, Pradeep Maroo, A.K. Goswami, and D.N. Purohit. 2010. “Spectrophotometric Determination of Lead(II) With 3-Hydroxy-3-M-Tolyl-1-O-Chlorophenyltriazene ”. Asian Journal of Chemistry 11 (2):649-50. https://asianpubs.org/index.php/ajchem/article/view/23338.