@misc{indiciaeff677be09aa3,
  title = {Are lignins optically active?},
  author = {J Ralph and J Peng and F Lu and R D Hatfield and R F Helm},
  year = {1999},
  doi = {10.1021/jf9901136},
  url = {https://pubmed.ncbi.nlm.nih.gov/10552598/},
  note = {Source identifier: 10552598}
}