Son, Nguyen, 		Nghia, Hoang, 		Quang, Pham, AND 		Boi, Luu.
" Production of Ethyl Biodiesel from Catfish Oil by New Method Using Ethyl Biodiesel as Co-Solvent" <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], Volume 36 Number 4 (23 December 2020)