1. School of Agriculture ‐ University of Lisbon Center of Mathematics, Fundamental Applications and Operations Research ‐ University of Lisbon Lisbon 1349‐017 Portugal
2. School of Engineering ‐ University of Minho ALGORITMI Research Centre ‐ University of Minho Guimarães Guimarães 4800‐019 Portugal
3. School of Science and Technology ‐ Universidade of Trás‐os‐Montes and Alto Douro INESCTEC Vila Real 5000‐801 Portugal
4. Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague ‐ Suchdol 16500 Czech Republic