@Article{	  Hackbusch.Kressner.Uschmajew:2016,
  author	= {Wolfgang Hackbusch and Daniel Kressner and Andr{\'e}
		  Uschmajew},
  title		= {Perturbation of higher-order singular values},
  journal	= {SIAM J. Appl. Algebra Geom.},
  fjournal	= {SIAM Journal on Applied Algebra and Geometry},
  volume	= {1},
  year		= {2017},
  number	= {1},
  pages		= {374--387},
  annote	= {journal},
  doi		= {10.1137/16M1089873},
    note		= {INS Preprint No. 1616},
  inspreprintnum= {1616}
}