贺逸秋, 华征, 郭一松, 宋鸿遇. 紫云英根瘤菌的exo与nod基因在宿主结瘤过程中的协同作用[J]. 生理学报 1992; 44 (2): .
He Yiqiu, Hua Zheng, Guo Yisong, Song Hongyu. Two classes of genes are involved in the nodulation of Astragalus sinicui. Acta Physiol Sin 1992; 44 (2): (in Chinese with English abstract).