18 Concept of Header and Item Tables Part1 - YouTube
SAP ABAP Table SNWD_SO_INV_HEAD (EPM: Sales Order Invoice Header Table), sap -tables.org - The Best Online document for SAP ABAP Tables
Invoice reference in accounts payable documents | SAP Blogs
SAP ABAP Table Field RBCO-PARKED_QTY (Parked Invoice Quantity) - SAP Datasheet - The Best Online SAP Object Repository
SAP ABAP Table BAPI_INCINV_DETAIL_HEADER (Transfer Structure for Invoice Header Data (GetDetail)), sap-tables.org - The Best Online document for SAP ABAP Tables