Test Design as Code: JCUnit. - Hiroshi Ukai; Xiao Qu (ICST, 2017)

Reduce Test Cost by Reusing Test Oracles through Combinatorial Join. - Hiroshi Ukai; Xiao Qu; Hironori Washizaki; Yoshiaki Fukazawa (ICST Workshops, 2019)

Accelerating covering array generation by combinatorial join for industry scale software testing. - Hiroshi Ukai; Xiao Qu; Hironori Washizaki; Yoshiaki Fukazawa (PeerJ Comput. Sci., 2022)