@misc{indiciaed310f239a4e6,
  title = {A backscatter model for a randomly perturbed periodic surface},
  author = {Ulaby, F. T. and Kouyate, F. and Fung, A. K.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19830028889},
  note = {Source identifier: 19830028889}
}