@misc{indiciaebd66c69c6c94,
  title = {Building a Shared Definitional Model of Long Duration Human Spaceflight},
  author = {Orr, M. and Whitmire, A. and Sandoval, L. and Leveton, L. and Arias, D.},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20110023088},
  note = {Source identifier: 20110023088}
}