Ha, N., 		Yem, T., & 		Mai, V.
(2008).
 Study on reuse of heavy metal rich sludge in ceramic pigment and construction material production.
<em>VNU Journal Of Science: Natural Sciences And Technology, 24</em>(4).
Retrieved from <a href="https://js.vnu.edu.vn/NST/article/view/3548" target="_new">https://js.vnu.edu.vn/NST/article/view/3548</a>