@entry{fri-pre-pen-04-aa,
  author = {MI Friswell and U Prells and JET Penny},
  title = {Determining uncertainty bounds for eigenvalues},
  journal = {Proceeding of ISMA,},
  volume = {},
  number = {},
  pages = {},
  year = 2004,
  month = ,
  doi = {},
  comment = {},
  abstract = {},
  url = {{\url{https://www.researchgate.net/profile/Michael-Friswell/publication/228998284_Determining_uncertainty_bounds_for_eigenvalues/links/0deec527e7fabd65bd000000/Determining-uncertainty-bounds-for-eigenvalues.pdf}}},
  quotes = {... discussion and examples that specifying the parameter uncertainty using interval analysis can lead to very complex sets of eigenvalues, and specifying these through affine arithmetic or ...}
}