References
**********

1. A.K. Rappe, C.J. Casewit, K.S. Colwell, W.A. Goddard III, and W. M.
   Skiff, *UFF, a Full Periodic Table Force Field for Molecular
   Dynamics Simulations*,  Journal of the American Chemical Society
   114, 10024-10035 (1992).

2. A.K. Rappe, W.A. Goddard III, *Charge Equilibration for Molecular
   Dynamics Simulations*,  The Journal of Physical Chemistry 95,
   3358-3363 (1991).

3. M. O'Keeffe and N.E. Brese, *Atom sizes and bond lengths in
   Molecules and Crystals*,  Journal of the American Chemical Society
   113, 3226-3229 (1991).

4. S.L. Mayo, B.D. Olafson, W.A. Goddard III, *DREIDING: A Generic
   Force Field for Molecular Simulations*,  The Journal of Physical
   Chemistry 94, 8897-8909 (1990).

5. C.J. Casewit, K.S. Colwell, A.K. Rappe, *Applications of a
   Universal Force Field to Main Group Compounds*,  Journal of the
   American Chemical Society 114, 10046-10053 (1992).

6. C.J. Casewit, K.S. Colwell, A.K. Rappe, *Application of a Universal
   Force Field to Organic Molecules*,  Journal of the American
   Chemical Society 114, 10035-10046 (1992).

For calculations with the UFF4MOF parameters:

7. M.A. Addicoat, N. Vankova, I.F. Akter, and T. Heine, *An extension
   of the Universal Force Field to Metal-Organic Frameworks*, J. Chem.
   Theory Comput. 10, 880-891 (2013)

For calculations with the UFF4MOFII parameters:

8. D.E. Coupry, M.A. Addicoat, and T. Heine, *An Extension of the
   Universal Force Field for Metal-Organic Frameworks*, J. Chem.
   Theory Comput. 12, 5215-5225 (2016)

For calculations with the APPLE&P forcefield:

9. O. Borodin, *Polarizable Force Field Development and Molecular
   Dynamics Simulations of Ionic Liquids*, J. Phys. Chem. B 113,
   11463–11478 (2009)
