On-Line Retrieval of Chemical Patent Information. An Overview and a Brief Comparison of Three Major Files. - Roger Grant Smith; Louise P. Anderson; Susan K. Jackson (J. Chem. Inf. Comput. Sci., 1977)

An Evaluation of the Leading Patent Equivalents Services. - Trisha M. Johns; William G. Andrus; Stanley De Voe; John Myers; Roger Grant Smith; Otokar Uhlir (J. Chem. Inf. Comput. Sci., 1979)