“Synthesis, Growth and Characterization of Bis Thiourea Sodium Zinc Sulphate Single Crystals-A Semi Organic Nlo Material”. International Journal of Chemistry and Materials Research 3, no. 4 (April 15, 2015): 91–99. Accessed August 2, 2026. https://archive.conscientiabeam.com/index.php/64/article/view/1853.