Joanna Kolodziej
Department of Computer Sciences (f-1)
Cracow University of Technology
Ul. Warszawska 24
31-155 Kraków, Poland
e-mail: Joanna.kolodziej[at]pk.edu.pl
Pino Caballero Gil
University of La Laguna
Department of Computer Engineering and Systems.
Higher Polytechnic School of Engineering & Technology
C/Astrofísico Francisco Sánchez s/n
38271 La Laguna. Tenerife. Canary Islands. Spain
E-mail: pcaballe[at]ull.edu.es
