Clauer, Norbert
Techer, Isabelle
Nussbaum, Christophe
Laurich, Ben
Funding for this research was provided by:
swisstopo, switzerland
Article History
Received: 6 March 2016
Accepted: 9 December 2016
First Online: 19 January 2017
Free to read: This content has been made available to all.