Van Anh, N., T. Thanh Hoa, T. Anh, L. Tuan, K. Bang, N. Bach, and N. Chau. “Green Tourism Market in Hanoi City: Opportunities and Challenges”. GPH-International Journal of Business Management, Vol. 9, no. 04, May 2026, pp. 97-08, doi:10.5281/zenodo.20456093.