@misc{indiciae9888321ed652,
  title = {A simple model for strong ground motions and response spectra},
  author = {Erdal Safak and Charles Mueller and John Boatwright},
  year = {2006},
  doi = {10.1002/eqe.4290160204},
  url = {https://pubs.usgs.gov/publication/70013844},
  note = {Source identifier: 70013844}
}