@misc{indiciae694993569c11,
  title = {Formation and interpretation of dilatant echelon cracks},
  author = {D. D. Pollard and P. Segall and P.T. Delaney},
  year = {1982},
  doi = {10.1130/0016-7606(1982)93<1291:faiode>2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70011543},
  note = {Source identifier: 70011543}
}