@misc{indiciae15a4e1505739,
  title = {On the solution of some important second order differential equations in physics using Lie series.},
  author = {Schett, A. and Weil, J. W.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670053316},
  note = {Source identifier: 19670053316}
}