Influence of Nitrogen Concentration on the C-Phycocyanin production of Spirulina platensis (Gomont) Geitler. PUPJST [Internet]. 2023 Mar. 11 [cited 2025 Apr. 3];13(1):1-9. Available from: https://publishing.pup.edu.ph/ojs/index.php/PUP-JST/article/view/34