@misc{indiciae59a609497a2a,
  title = {A Time Integration Algorithm Based on the State Transition Matrix for Structures with Time Varying and Nonlinear Properties},
  author = {Bartels, Robert E.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20030031350},
  note = {Source identifier: 20030031350}
}