**Author details**

Janja Kramer Stajnko<sup>1</sup> \*, Renata Jecl1 and Jure Ravnik<sup>2</sup>

Address all correspondence to: janja.kramer@um.si

1 Faculty of Civil Engineering, Transportation Engineering and Architecture, University of Maribor, Maribor, Slovenia

2 Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
