- Author: Maarten van Ham, Tiit Tammaru, Rūta Ubarevičienė, Heleen Janssen
- Language: English
- Year: 2021
- Author: Tiit Tammaru Szymon Marcińczak Maarten van Ham Sako Musterd
- Language: English
- Year: 2015
- Author: Daniel Baldwin Hess Tiit Tammaru Maarten van Ham
- Language: English
- Year: 2018