Kien, Tran, Huyen Dong, Thu Nguyen, and Thang Nguyen. 2021. “Application of Material Flow Analysis (MFA) for Estimating the Potential of Nitrogen Recirculation in Closed-Ecosystem Based Catfish Farming”. Science & Technology Development Journal - Science of The Earth & Environment 5 (SI1), SI1-SI12. https://doi.org/https://doi.org/10.32508/stdjsee.v5iSI1.569.