1. Professor, Dept. of Dynamics of Complex Systems, Institute of Fundamental Technological Research, Polish Academy of Sciences, 21 Swietokrzyska St., 00-049 Warsaw, Poland; and, Department of Mathematics, Informatics and Mechanics, Univ. of Warsaw, Poland (corresponding author).
2. Graduate Student, Dept. of Mechanical and Industrial Engineering, Univ. of Thessaly, Volos 38334, Greece.
3. Professor, Dept. of Mechanical and Industrial Engineering, Univ. of Thessaly, Volos 38334, Greece.