@article{5441,
  author = {W. H. Urbanus and R. G. C. Wojke and Rjjm Steenvoorden and J. G. Bannenberg and H. Klein and A. Schempp and R. W. Thomae and T. Weis and P. W. van Amersfoort},
  title = {Simultaneous Transport of N+ and N-2+ Ions through a Periodic Focusing Quadrupole Channel},
  year = {1989},
  journal = {Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment},
  volume = {276},
  number = {3},
  pages = {433-444},
  month = {Apr 1},
  isbn = {0168-9002},
  doi = {10.1016/0168-9002(89)90568-8},
  language = {eng},
}