@misc{indiciaefa690e9875bc,
  title = {Necessary conditions for optimization in multiparameter discrete systems},
  author = {Hegg, D. R. and Mcclamroch, N. H.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19840027804},
  note = {Source identifier: 19840027804}
}