- Author: Travis Anthony S
- Language: English
- Year: 2018
- Author: Travis Anthony S
- Language: English
- Year: 2018
- Author: Mallett John
- Language: English
- Year: 2014
- Author: Issi Mustapha Missbah El, McElhatton Anna
- Language: English
- Year: 2016
- Author: Andrew C. Hoefler
- Language: English
- Year: 2004