Chanmuang, C. ., W. Kongmuang, J. Pearce, and T. Chairuangsri. “Influence of Casting Techniques on Hardness, Tarnish Behavior and Microstructure of Ag-Cu-Zn-Si Sterling Silver Jewelry Alloys”. Journal of Metals, Materials and Minerals, vol. 22, no. 2, Dec. 2012, https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/34.