1. Department of Mathematics and Applied Mathematics, University of Crete, Heraklion70013, Greece
2. Institute of Applied and Computational Mathematics, Foundation for Research and Technology−Hellas, Heraklion70013, Greece
3. Institute of Electronic Structure and Laser, Foundation for Research and Technology−Hellas, Heraklion70013, Greece
4. Department of Chemistry, University of Crete, P.O. Box 2208, Heraklion71003, Greece
5. Computation-Based Science and Technology Research Center, The Cyprus Institute, Nicosia2121, Cyprus
6. CNR-IPCF, c/o Physics Department, University of Pisa, Largo Pontecorvo 3, Pisa56127, Italy