Markush Structures Sheffield University

Lynch, M.F. Generic Chemical Structures in Patents (Markush Structures) the Research Project at the University of Sheffield . World Patent Information 1986, 8, 85-91. 

Suhr, C von Harsdorf, E. Dethlefsen, W. Derwent s CPI and IDC s GREMAS Remarks on their Relative Retrieval Power with Regard to Markush Structures . In Proceedings of a Conference organised by the Chemic Structure Association at the University of Sheffield, England, 26-29 March 1984. 

---