Flag-transitive 2-designs from PSL(2, q) with block size 4. - Xiaoqin Zhan; Suyun Ding; Shuyi Bai (Des. Codes Cryptogr., 2019)

Block-transitive automorphism groups on 2-designs with block size 4. - Xiaoqin Zhan; Tao Zhou; Shuyi Bai; Shali Peng; Lingfang Gan (Discret. Math., 2020)