Sulistyo, Joko, Rita Dwi Rahayu, and Sri Purwaningsih. 2015. “Assay for Antioxidant Activity of Algal, Yeast and Fungal Culture Extracts”. Journal of Innovations in Pharmaceutical and Biological Sciences 2 (4):402-10. https://jipbs.com/index.php/journal/article/view/82.