1. Department of Chemistry, Life Science and Environmental Sustainability, Parma University, Parco Area delle Scienze 17/A, 43124 Parma, Italy
2. Condensed Matter and Statistical Physics, International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
3. Division of Theoretical Physics, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia