@article{mai_sudret_haukaas_2015, 
  title={Polynomial chaos expansions for damped oscillators}, 
  DOI={10.3929/ethz-a-010494778}, 
  publisher={ETH Zurich}, 
  author={Mai, Chu V. and Sudret, Bruno and Haukaas, T.}, 
  year={2015}
  }