A. Mohammad, S., and S. Y. Zebary. “Spectrophotometric Assay of Yttrium(III) With Alizarin Red S in the Presence of Etyltrimethylammonium Bromide -Application to Water Samples”. Rafidain Journal of Science, vol. 27, no. 2, June 2018, pp. 127-3, doi:10.33899/rjs.2018.145397.