@misc{indiciae6dcf2914bcfb,
  title = {The systematic evolution of a NASA software technology, Appendix C},
  author = {Deregt, M. P. and Dulfer, J. E.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730005464},
  note = {Source identifier: 19730005464}
}