S. I. Sani, R. H. S. Koestoer, A. H. Adam, A. A. Umar, H. S. Yau, and M. A. Hassan, “Public transport accessibility and efficiency as determinants of urban image: A comparative study of Japanese and Nigerian Cities”, JCBAU, vol. 3, no. 2, pp. 89–109, Jan. 2026.