Nguyen, Khanh, and Yasuaki Maeda. 2016. “Microalgal Culture With Digestate from Methane Fermentation - Light Environment in the Culture Solution With Different Digestate Concentrations and Microalgal Cell Densities”. CTU Journal of Innovation and Sustainable Development, no. Renewable Energy (July):57-63. https://doi.org/10.22144/ctu.jsi.2016.009.