Ni, W., S. Hu, W. Hazi, Y. Wang, J. Qiao, R. Yan, and C. Chen. “Sheep 7SK Promoter for Short Hairpin RNA Expression”. Electronic Journal of Biotechnology, vol. 15, no. 2, Feb. 2012, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v15n2-10.