Mufidatun, Anita, et al. “The Effect of PH on Contamination Reduction and Metabolite Contents in Mass Cultures of Spirulina (Arthrospira Platensis Gomont)”. International Journal on Advanced Science, Engineering and Information Technology, vol. 13, no. 1, Feb. 2023, pp. 84-90, doi:10.18517/ijaseit.13.1.16582.