@misc{indiciaefda18911687c,
  title = {Explicit-explicit subcycling with non-integer time step ratios for structural dynamic systems},
  author = {Neal, Mark O. and Belytschko, Ted},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890054967},
  note = {Source identifier: 19890054967}
}