1. Departamento de Física, Universidade Federal do Paraná, 81531-990 Curitiba, Brazil
2. Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany
3. Complexity Sciences Center, 9225 Collins Avenue Suite 1208, Surfside, Florida 33154-3001, USA
4. Instituto de Altos Estudos da Paraíba, Rua Silvino Lopes 419–2502, 58039-190 João Pessoa, Brazil