Feng, Y., W. Li, and J. Q. Wang. “MicroRNA-33A Expression Is Reduced in Cerebral Cortex in a Rat Model of Ischemic Tolerance”. Cellular and Molecular Biology, vol. 61, no. 3, June 2015, pp. 24-29, https://mail.cellmolbiol.org/index.php/CMB/article/view/664.