EHS Report Management Document Key

I am working in the EHS module.  In ABAP I am using the FM BAPI_BUS1077_GETDETAIL and have tried a number of different VATS to retrieve the Document Key for the reports attached to the specifications without success.  In SAP, using transaction CG02BD, enter a specification number.  Then from the top menu follow Specification -> Reports -> Report Management.  Highlight a released report.  Press Utilities -> Administration Information and the Document Key is listed there. Does anyone know how to retrieve this same information in ABAP?  That is what I need to complete my program.  I appreciate your help experts!!