Bei Song xi bei cheng zhen bu ju, zhi li yu bian jiang she hui wen ding yan jiu = A research on the distribution, governance and social stability of northwest forts in Northern Song Dynasty / Liu Jin, Kang Lei zhu.
北宋西北城镇布局, 治理与边疆社会稳定研究 = A research on the distribution, governance and social stability of northwest forts in Northern Song Dynasty / 刘缙, 康蕾著.