1
Published 2016
MDPI AG - Multidisciplinary Digital Publishing Institute

2
by Pabulo H. Rampelotto
Published 2016
MDPI AG - Multidisciplinary Digital Publishing Institute

3
by Gabriele Berg
Published 2015
Frontiers Media SA

4
by Olson, Steve
Published 1989
National Academy Press

5
by Frank Reith
Published 2018
MDPI - Multidisciplinary Digital Publishing Institute

6
by Spiros Paramithiotis
Published 2018
Frontiers Media SA