- Author: Verden-Zöller Gerda, Bunnell Pille, Maturana Humberto R
- Language: English
- Year: 2008
- Author: Staemmler Frank-M
- Language: German
- Year: 2016
- Author: Lanik Martin
- Language: English
- Year: 2018
- Author: Greene John O
- Language: English
- Year: 2009
- Author: Cook Thomas A
- Language: English
- Year: 2019
- Author: Nasher Jack
- Language: German
- Year: 2017