@misc{indiciae387609e7674a,
  title = {On multilevel block modulation codes},
  author = {Kasami, Tadao and Takata, Toyoo and Fujiwara, Toru and Lin, Shu},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910064735},
  note = {Source identifier: 19910064735}
}