https://userapps.support.sap.com/sap/support/knowledge/en/3304104
3304104 - Name of fields EKPO-REFBS and EKPO-REFPS | SAP Knowledge Base Article
In enjoy transaction codes ME21N ME22N and ME23N, it is observed that the fields EKPO-REFBS and EKPO-REFPS are displayed with name 'Ref.Doc.' and 'Ref.Itm'....