@article{pei_pei_yang_zhang_2012,  title={Ca2Ge7O16 nanowires grown from CaO and GeO2},  volume={15},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392011005000090},  DOI={10.1590/S1516-14392011005000090},  number={1},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Pei, Li-Zhai and Pei, Yin-Qiang and Yang, Yong and Zhang, Qian-Feng},  year={2012},  month={Jan},  pages={90–96} }