@misc{indiciae04a885454f10,
  title = {Implementation of a trapezoidal ring element in NASTRAN for elastic-plastic analysis},
  author = {Chen, P. C. T. and Ohara, G. P.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800016162},
  note = {Source identifier: 19800016162}
}