@article{silva1994,
  author  = {Silva, Ravi and Qureshi, Hassan and Rao, Farhana and Nakamura, Omar},
  title   = {Spectral Analysis for Activated Sludge Treatment},
  journal = {Open Access Journal of Engineering Applications},
  year    = {1994},
  volume  = {18},
  number  = {2},
  pages   = {851-865},
  issn    = {3105-7004},
  doi     = {10.55555/oajea.1994.1802.040},
  url     = {https://journal.bsaps.com/article/7157}
}