@article{ToeroekBergerKliem2010,
  author    = {Tibor T{\"o}r{\"o}k and Mitch A. Berger and Bernhard Kliem},
  title     = {The writhe of helical structures in the solar corona},
  doi       = {10.1051/0004-6361/200913578},
  url       = {http://dispatch.opac.d-nb.de/DB=1.1/SET=4/TTL=1/SHW?FRST=1\&PRS=HOL},
  year      = {2010},
}