@misc{indiciae9ecafc91c32a,
  title = {Angle factors for radiant interchange between parallel-oriented tubes.},
  author = {Jonsson, V. K. and Sparrow, E. M.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19640025013},
  note = {Source identifier: 19640025013}
}