@misc{indiciaefb91b64cbd9b,
  title = {Application of adjoint operators to neural learning},
  author = {Barhen, J. and Toomarian, N. and Gulati, S.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900062971},
  note = {Source identifier: 19900062971}
}