Zyla, Gordon http://orcid.org/0000-0001-8202-1574
Kovalev, Alexander http://orcid.org/0000-0002-9441-5316
Grafen, Markus
Gurevich, Evgeny L.
Esen, Cemal
Ostendorf, Andreas http://orcid.org/0000-0002-3601-6392
Gorb, Stanislav
Article History
Received: 10 August 2017
Accepted: 4 December 2017
First Online: 15 December 2017
Competing Interests
: The authors declare that they have no competing interests.