@misc{indiciae8a0bd0b8db5e,
  title = {Some long, rate one-half, binary convolutional codes with an optimum distance profile and the systematic versus nonsystematic code question},
  author = {Johannesson, R.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750022755},
  note = {Source identifier: 19750022755}
}