@misc{indiciae8c00c1ecf8d3,
  title = {Principal stress directions from plastic flow in crystals},
  author = {Neville L. Carter and C. Barry Raleigh},
  year = {1969},
  doi = {10.1130/0016-7606(1969)80[1231:psdfpf]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70224622},
  note = {Source identifier: 70224622}
}