@misc{indiciae027c3c7620a5,
  title = {Residuated Lattices.},
  author = {M Ward and R P Dilworth},
  year = {1938},
  doi = {10.1073/pnas.24.3.162},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588213/},
  note = {Source identifier: 16588213}
}