@article{MarmodeedeKlerkArieseetal.2009,
  author    = {Bettina Marmod{\´e}e and Joost de Klerk and Freek Ariese and Cees Gooijer and Michael Uwe Kumke},
  title     = {Metal binding by humic substances : characterization by high-resolution-lanthanide-ion-probe-spectroscopy (HR- LIPS)},
  url       = {http://www.znaturforsch.com/a.htm},
  year      = {2009},
}