1. Department of Chemistry, Centre for advance studies in chemistry, Guru Nanak Dev University, Amritsar 143005, India, http://department.gndu.ac.in/department/chemistry.asp
2. Departament de Química Inorgànica, Universitat de Barcelona (UB), Av. Diagonal 645, 08028 Barcelona, Spain http://www.ub.edu/inorgani/en/index.html