G. M. Dyson, W. E. Cossum, Michael F. Lynch, Howard Lee Morgan Mechanical manipulation of chemical structure: Molform computation and substructure searching of organic structures by the use of cipherdirected, extended and random matrices. [Citation Graph (0, 0)][DBLP] Information Storage and Retrieval, 1963, v:1, n:2-3, pp:69-99 [Journal]