Automated retrieval of purine literature

The scientific papers of the revised literature are not a unit when considered terminologically for automated retrieval. A 60-80% of the total valid references obtained through each data base was stored in the computer memory in virtually closed compartments although they belonged to the same material complex. The retrieval of these papers requires independent profiles series which although they give rise 14-28% duplicate references, the final yield can be increased by 100-200% of the yield obtained through the basic profile of the central subject considered.