@misc{indiciaec576e3ce64b3,
  title = {HARMONIC ANALYSIS FOR CERTAIN SEMIGROUPS.},
  author = {E Hewitt and H S Zuckerman},
  year = {1956},
  doi = {10.1073/pnas.42.5.253},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589860/},
  note = {Source identifier: 16589860}
}