For the 2014-15 urn forest cases, a Dutch study was translated into German with the financial support of the VfG, which at the time was the first comprehensive study on the heavy metal problem in the ashes of the deceased. Because of its great importance, it is still considered a standard work today. The original version of the study can be found here and the German translation can be found below:

VfG continually documents the urn forest cases that have been either launched, applied for or failed. Here is the current overview graphic from May 2020:

Übersichtsgrafik Urnenwaldvorhaben
Morgenroth, Andreas, own research