Fox, M.A., Goeta, A.E., Howard, J.A.K., Hughes, A.K., Johnson, A.L., Keen, D.A., Wade, K., Wilson, C.C., "The molecular structure of (PSH+)(nido-7,8-C2B9H12-) determined by neutron diffraction (PS = proton sponge, 1,8- bis(dimethylamino)naphthalene)", Inorganic Chemistry, 2001