1. Laboratory of Theoretical Physics,
Department of Physics, University of Puerto Rico, Rio Piedras, Puerto Rico 00936-8377
2. Department of Physical Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań,
Poland
3. Department of Chemical
and Environmental
Engineering, University of California,
Riverside, California 92521-0425, United States
4. Department of Chemistry and
Biochemistry, Brigham Young University,
Provo, Utah 84602-5700, United States