The Chemical Abstracts Service Chemical Registry System. I. General Design. - Paul G. Dittmar; Robert E. Stobaugh; Charles E. Watson (J. Chem. Inf. Comput. Sci., 1976)

An Algorithmic Computer Graphics Program for Generating Chemical Structure Diagrams. - Paul G. Dittmar; Joseph Mockus; Kathyrn M. Couvreur (J. Chem. Inf. Comput. Sci., 1977)

The CAS ONLINE search system. 1. General system design and selection, generation, and use of search screens. - Paul G. Dittmar; Nick A. Farmer; William Fisanick; Reginald C. Haines; Joseph Mockus (J. Chem. Inf. Comput. Sci., 1983)