Bai, R., P. Zhao, G. Cao, S. Wen, Q. Li, and Q. Meng. “Ghrelin Promotion of Oocyte Maturation via ERK1/2 Pathway in Ovis Aries”. Cellular and Molecular Biology, vol. 58, no. 2, Dec. 2012, pp. 1797-02, https://www.cellmolbiol.org/index.php/CMB/article/view/567.