@misc{indiciae5489262e723f,
  title = {Observations on changes in ultrasonically treated waste-activated sludge.},
  author = {C P Chu and B V Chang and G S Liao and D S Jean and D J Lee},
  year = {2001},
  doi = {10.1016/s0043-1354(00)00338-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/11235869/},
  note = {Source identifier: 11235869}
}