@inbook{7063,
  author = {R. Keppens and Z. Meliani and K. Tsinganos and et al},
  title = {Extragalactic jets with helical magnetic fields},
  year = {2009},
  journal = {Protostellar Jets in Context},
  volume = {Astrophysics and Space Science Proceedings, 2009},
  pages = {555-557 },
  language = {eng},
}