@misc{indiciae0b615a313e68,
  title = {A new vector-matrix second order sensitivity equation with application to entry problem},
  author = {Cefola, P. J. and Shen, C. N.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700050208},
  note = {Source identifier: 19700050208}
}