U. D. Khanh, L. D. An, T. P. Tuan, T. T. H. Nga, B. Q. Dung and N. T. Huong, Overview of geographical conditions and natural resources of fifty islands on the Bac Bo coastline of Vietnam, Vietnam J. Earth Sci. 35 (2014) 318–326. DOI: https://doi.org/10.15625/0866-7187/35/4/4115.