Each group of synonyms (English) is linked to a bibliographic reference. The database (Bibliomac for Macintosh only) is driven by a software called 4D. Unfortunately this database is no longer developed. It's a pity because the possibility to link a group of synonyms with bibliographic references is uncommon and powerful for data mining. Reference Manager can do something similar but I don't know how to transfer this list from bibliomac to it because I'm not a computerist? Could somebody help me? I can send the database and the software (unfortunately in French).