@article{HagemannLadeWarnieretal.2007,
  author    = {Hans-J{\"u}rgen Hagemann and H. Lade and J. Warnier and D. U. Wiechert},
  title     = {The performance of Depressed-Cladding Single-Mode Fibres with Different b/a Ratios. Hagemann, H.-J.; Lade, H.; Warnier, J.; Wiechert, D. U.},
  journal   = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 9 (1991), H. 6},
  pages     = {689 -- 694},
  year      = {2007},
}