Bac, Dang, 		Bao, Dang, 		Burkhard, Benjamin, 		Müller, Felix, AND 		Linh, Giang.
" Cultural Ecosystem Services Assessment  Based on Geomorphological Approach – Case Study in Sapa, Lao Cai Province" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 33 Number 4 (29 December 2017)