- Author: LYUBOMIR T. GRUYITCH
- Language: English
- Year: 2018
- Author: Zoran M. Buchevats Lyubomir T. Gruyitch
- Language: English
- Year: 2017
- Author: Lyubomir T. Gruyitch
- Language: English
- Year: 2017
- Author: Lyubomir T. Gruyitch
- Language: English
- Year: 2015
- Author: Lyubomir T. Gruyitch
- Language: English
- Year: 2013
- Author: Lyubomir T. Gruyitch Jean-Pierre Richard Pierre Borne Jean-Claude Gentina
- Language: English
- Year: 2003