- Author: Alexander M. Franke
- Language: English
- Year: 2015
- Author: Essvale Corporation Limited
- Language: English
- Year: 2010
- Author: Spencer J. Fritz
- Language: English
- Year: 2009
- Author: Sarah Kumpf
- Language: English
- Year: 2013
- Author: Fara Madehah Ahmad Farid
- Language: English
- Year: 2012
- Author: Dennis Campbell and Iuliana Mogosanu
- Language: English
- Year: 2022
- Author: Stowell David P
- Language: English
- Year: 2017
- Author: Pignataro Paul
- Language: English
- Year: 2013
- Author: Kosman Joshua
- Language: English
- Year: 2009