Hai, Ho, 		Chau, Chu, 		Quynh, Nguyen, 		Hai, Phan, 		Tuan, Le, AND 		Binh, Nguyen.
" Synthesis of graphene oxide sulfonated and estimation of its catalytic activity in conversion reaction of fructose to 5-hydroxylmethyfural" <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], Volume 32 Number 4 (15 December 2016)