1. Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti, 4748, 84030-900, Ponta Grossa – Paraná PR, Brazil
2. National Institute of Science and Technology for Complex Systems, Centro Brasileiro de Pesquisas Físicas, 22290-180, Rio de Janeiro – RJ, Brazil
3. Departamento de Física, Universidade Estadual de Maringá, Brazil
4. National Institute of Science and Technology on Complex Fluids, Instituto de Física–USP, São Paulo, SP 05508-090, Brazil
5. Departamento de Física, Universidade Tecnológica Federal do Paraná, Avenida Marcilio Dias 635, Apucarana – Paraná, Brazil
6. Institute of Physics, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University in Skopje, Arhimedova 3, 1000 Skopje, Macedonia
7. Research Center for Computer Science and Information Technologies, Macedonian Academy of Sciences and Arts, Bul. Krste Misirkov 2, 1000 Skopje, Macedonia
8. Institute of Physics & Astronomy, University of Potsdam, D-14776 Potsdam-Golm, Germany