@misc{indiciae1e05450e2961,
  title = {Analytical solution of Euler-Lagrange equations for optimum coast trajectories},
  author = {Ng, C. H. and Palmadesso, P. J.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660025643},
  note = {Source identifier: 19660025643}
}