@article{BommerAbrahamsonStrasseretal.2004,
  author    = {Julian J. Bommer and Norman A. Abrahamson and F. O. Strasser and Alain Pecker and Pierre-Yves Bard and Hilmar Bungum and Fabrice Cotton and Donat F{\"a}h and F. Sabetta and Frank Scherbaum and Jost Studer},
  title     = {The challenge of defining upper bounds on earthquake ground motions},
  year      = {2004},
}