@inbook{6455,
  author = {J. Oomens and G. von Helden and G. Meijer and S. Pfalzner and C. Kramer and C. Staubmeier and A. Heithausen},
  title = {Infrared spectroscopy of ionic PAHs and related compounds},
  year = {2004},
  journal = {The Dense Interstellar Medium in Galaxies},
  pages = {545-548},
  publisher = {Springer-Verlag, Berlin},
  language = {eng},
}