Haruo, N., 		Thanh, T., & 		Hoa, T.
2013 Mar 15.  Some Difficulties and Suggestions for Sustainable Marine Eco-tourism in Vietnam and Japan: Case Studies of Vân Đồn District, Quảng Ninh Province and Akkeshi Town, Hokkaido. VNU Journal of Science: Earth and Environmental Sciences. [Online] 29:1