@misc{indiciaec4693a1cea34,
  title = {DOPEX-1D2C: A one-dimensional, two-constraint radiation shield optimization code},
  author = {Lahti, G. P.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730018852},
  note = {Source identifier: 19730018852}
}