Tran Quoc, Binh, 		Xuan, Pham, 		Tuan, Pham, 		Thuy, Le, 		Linh, Nguyen, AND 		Huy, Man.
" Calculating real surface area of land parcels in hilly and mountainous regions" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 33 Number 4 (29 December 2017)