《宋书·志·卷十五》
太学博士周山塞议论说： 考察为抚养自己的庶母，服小功丧服五个月。
太学博士周山文议： 案庶母慈己者，小功五月。
The erudite scholar Zhou Shan of the Imperial Academy argues that since she raised her, she should observe the five-month period of mourning for a secondary mother.