1. Newcastle University, Newcastle Upon Tyne, U.K.
2. Saudi Electronic University, Riyadh, Saudi Arabia
3. College of Computer Science and Engineering, Taibah University, Madinah, Saudi Arabia
4. University of Oxford, Oxford, U.K.
5. School of Computing, Newcastle University, Newcastle Upon Tyne, U.K.
6. Durham University, Durham, U.K.
7. Institute of Computer Science, AGH University of Science and Technology, Kraków, Poland