Du1, Qiu-Jiang, and Wen-Bin Chen2. “Spectrophotometric Determination of Micro Germanium(IV) With 5-(4-Carboxylphenylazo)-8-Hydroxylquinoline As Colour Reagent”. Asian Journal of Chemistry 25, no. 18 (December 13, 2013): 10373–10375. Accessed November 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_19_79.