3Wnno C, en-xinn 2005 Introduced nerformance of 13 early rioenin, walnut varieties in the mountains of 'Qinba' . China Fruits, (2): 31 - 33.
4Wang Gen-xian. 2009. The problems and countermeasures of early ripening walnut of the mountains of'Qinba' in the process of cultivation. Shaanxi Journal of Agricultural Sciences, 55 (1): 102 - 103, 130.
5Xiao Qian-wen, Xiao Qian-gang, Zhou Lan-ying, Pu Guang-lan, Wu Kai-zhi, Hu Ting-xing, Zhang Shang-jie, Jin Yin-chun, Li Sen, Shi Li-hui. 2013. A new early-maturing and thin shell walnut cultivar ' Shuangzao' . Acta Horticulturae Sinica, 40 (1): 179 - 180.
