@article{tang_shi_2008,  title={Preparation of nano-MgO using ultrasonic method and its characteristics},  volume={33},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46702008000100002},  DOI={10.1590/S0100-46702008000100002},  number={1},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={Tang, Zhen-Xing and Shi, Lu-E},  year={2008},  pages={15–20} }