《宋元學案》卷三五《陳鄒諸儒學案》列周必大、周必彊、周必剛三兄弟爲劉若川門人,言“周必剛”和“周必彊”如下:周必剛,字子粟,益公之弟也。益公謂其“仁而剛,敬而和,敏而好學,事母孝,從兄順,與人交忠信廉遜。”卒,年三十三。(參《益公集》) “Song and Yuan Dynasties case” volume three five “Chen Zou Zhu Confucianism case” column Zhou Bida, Zhou Biqiang, Zhou BIGANG three brothers for Liu Ruo-chuanmen people, saying “Zhou BIGANG” and “Zhou Biqiang ” are as follows: Male brother also. Yi Gong said its “Ren and just, respect and and, sensitive and studious, mother and filial piety, brother-in-law, and honest people.” Death, year thirty-three. (See “benefit public”)