Nugroho, W. A., Lutfi, M., & Susilo, B. (2016). Promoting the Growth of Chlorella vulgaris in Secondary Wastewater Treatment Effluent of Tofu Industry using Azospirillum sp. International Journal on Advanced Science, Engineering and Information Technology, 6(3), 289–294. https://doi.org/10.18517/ijaseit.6.3.748