@misc{indiciaebc5e5a639709,
  title = {A triangular property of the associated Legendre functions},
  author = {Fineschi, S. and Landi Degl'innocenti, E.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900061987},
  note = {Source identifier: 19900061987}
}