@misc{indiciae9c53f0d951a5,
  title = {Solution of coupled and singular perturbation methods using duality theory.},
  author = {Chan, W. L. and Leininger, G. G.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730050556},
  note = {Source identifier: 19730050556}
}