@misc{indiciaeea490ecfa553,
  title = {ON NON-NEGATIVE-VALUED MATRICES.},
  author = {Y K Wong},
  year = {1954},
  doi = {10.1073/pnas.40.2.121},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589429/},
  note = {Source identifier: 16589429}
}