de Wall, HelgaWorm, Horst-Ulrich2015-04-142015-04-142001https://hdl.handle.net/11299/1712811 electronic resource (PDF)enIRM Quarterly, Volume 10, Number 4 (Winter 2000-2001). Cover article: A cautionary note: On interpreting frequency-dependence of susceptibility solely in terms of superparamagnetism or Two ways to be wrongNewsletter or Bulletin