1. Department of Informatics, State University of Ponta Grossa, Ponta Grossa, Brazil
2. Federal Technological University of Parana, Ponta Grossa, Brazil
3. Department of Computer Science, Federal Technological University of Parana, Ponta Grossa, Brazil
4. Department of Computer Science, State University of Ponta Grossa, Ponta Grossa, Brazil
5. Department of Agronomy, Londrina State University, Londrina, Brazil