@misc{indiciae3c295c8d599e,
  title = {A Numerical Scheme for Ordinary Differential Equations Having Time Varying and Nonlinear Coefficients Based on the State Transition Matrix},
  author = {Bartels, Robert E.},
  year = {2002},
  url = {https://ntrs.nasa.gov/citations/20020073159},
  note = {Source identifier: 20020073159}
}