@unpublished{SchumacherSeehafer2007,
  author  = {J{\"o}rg Schumacher and Norbert Seehafer},
  title   = {Bifurcation analysis of the plane sheet pinch},
  institution = {Institut f{\"u}r Physik und Astronomie},
  series    = {NLD Preprints},
  number    = {56},
  year    = {2007},
}