Liu, C X, X Xu, X L Chen, P B Yang, J S Zhang, and Y Liu. 2015. “Glutamate Promotes Neural Stem Cell Proliferation by Increasing the Expression of Vascular Endothelial Growth Factor of Astrocytes in Vitro”. Cellular and Molecular Biology 61 (4):75-84. https://www.cellmolbiol.org/index.php/CMB/article/view/691.