1. Department of Biology, University of Tirana, Albania
2. Center for Mathematics and Applications (NOVA Math), NOVA School of Science and Technology (NOVA SST), Portugal
3. Center for Mathematics and Applications (NOVA Math), NOVA School of Science and Technology (NOVA SST), Portugal and
Research and Development Unit for Mechanical and Industrial Engineering (UNIDEMI), NOVA School of Science and Technology (NOVA SST), Portugal