@misc{indiciae9d5085029f48,
  title = {There is no MacWilliams identity for convolutional codes},
  author = {Shearer, J. B. and Mceliece, R. J.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780031909},
  note = {Source identifier: 19780031909}
}