@misc{indiciae60ac7634923f,
  title = {Necessary conditions for joining optimal singular and nonsingular subarcs},
  author = {Mcdanell, J. P. and Powers, W. F.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710054599},
  note = {Source identifier: 19710054599}
}