MORCAD, an object-oriented molecular modelling package running on IBM RS/6000 and SGI 4Dxxx workstationsM Le Bret, J Gabarro-Arpa, JC Gilbert and C LemarechalJ. Chim. Phys., 88 (1991) 2489-2496DOI: https://doi.org/10.1051/jcp/1991882489