1. Chemistry Department, Brock University, 500 Glenridge Ave., St. Catharines, Ontario, L2S 3A1, Canada, http://https://www.brocku.ca/mathematics‐science/departments‐and‐centres/chemistry/people/faculty/georgii‐i‐nikonov
2. Institut de Química Computacional and Departament de Química, Campus de Montilivi, Universitat de Girona, 17071 Girona, Spain, http://iqc.udg.es/~vybo