Anisotropy of first-order exchange (repulsion) term in different H2 . . H2 dimers J Langlet, S Creuzet, J Caillet, F Colonna and O Hess J. Chim. Phys., 88 (1991) 2387-2398 Published online: 29 May 2017 DOI: 10.1051/jcp/1991882387