@misc{indiciae5ee51efd922d,
  title = {A generalized Zubov formulation for limit cycles in third order nonlinear systems.},
  author = {Schultz, D. G. and Wozny, M. J.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670041616},
  note = {Source identifier: 19670041616}
}