@misc{indiciae270dd40a3c76,
  title = {A Quasi-Linear Behavioral Model and an Application to Self-Directed Learning},
  author = {Ponton, Michael K. and Carr, Paul B.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/19990018653},
  note = {Source identifier: 19990018653}
}