@misc{indiciaeef3c8ab8cdc3,
  title = {A finite element method for the plastic bending analysis of structures},
  author = {Armen, H., Jr. and Levine, H. S. and Pifko, A.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680028492},
  note = {Source identifier: 19680028492}
}