1. Of ferman and;Vögtle;Chem Int Ed,1980
2. ibid ibid unpublished results;Dubois;Tetrahedron Acad Sci Chim Phys,1978
3. For a review of the principle systems see : Cpmputer AssistedOrganicSyntheiEds American Chemical Washington çpputer Assisted Structure Elucidation American Chemical Washington ibid ibid ibid ibid ibid;Wipke;Society Society Acad Sci Bull Soc Chim Acad Sci Acad Sci,1977
4. Gotz;Bienvenue;Chem Res,1979
5. REFERENCES Description Acquisition Retrieval Computer aided design The Chemical Applications of Graph Theo Academic Press pp Coputer Representation and Manipulation of Chemical Information Copyright by of;DARC;Israel Journal Chemistry,1976