@article{wang_wang_wan_2012,  title={Preparation and evaluation of a biomimetic scaffold with porosity gradients in vitro},  volume={84},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652012000100003},  DOI={10.1590/S0001-37652012000100003},  number={1},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Wang, Qianbin and Wang, Qiguang and Wan, Changxiu},  year={2012},  month={Mar},  pages={9–16} }