@misc{indiciaeecef7aa56c1c,
  title = {Elastic-plastic analysis of a propagating crack under cyclic loading},
  author = {Newman, J. C., Jr. and Armen, H., Jr.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740045420},
  note = {Source identifier: 19740045420}
}