1
published 2018
Journal
2
published 2017
Journal
3
published 2016
Journal
4
published 2014
Journal
5
published 2014
Journal
6
Published in Energie-, Wasser-Praxis (2012)
Journal
7
published 2012
Journal
8
published 2012
Loose Leaf Collection
9
Published in Handelszeitung (2011)
Journal
10
published 2010
Journal
11
published 2010
Journal
12
published 2010
Journal
13
published 2010
Journal
14
15
published 2009
CD-ROM
16
published 2009
Journal
17
published 2009
Journal
18
published 2009
Journal
19
published 2009
Journal
20
published 2008
Journal