@misc{indiciae5915c6eedb7c,
  title = {The optimal number of menu options per panel},
  author = {Paap, Kenneth R. and Roske-Hofstrand, Renate J.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870038564},
  note = {Source identifier: 19870038564}
}