M. Hidayaturrahman, A. B. Sinaga, A. H. Ubaid, A. A. P. Sugiantiningsih, E. Elazhari, and S. Sudarman, “Exploring Patterns of Collective Corruption and Integrity Risks by Regional Heads in Indonesia”, JGPP, vol. 12, no. 2, pp. 159–173, Jun. 2025.