“…Nature and human society are rich sources of complex systems (examples can be found, e.g., in economics, social sciences, network theory, dynamics of research groups, etc. [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]). Because of this the complex systems attract much research attention in the last decades, see for examples, [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”