http://www.bi.go.id/en/sistem-pembayaran/sistem-setelmen/bi-rtgs/bi-rtgs/Contents/Default.aspx
http://www.bi.go.id/en/sistem-pembayaran/edukasi/Documents/23ff01c7517447fc828d5166b6f6b6cfSistemBIRTGS_Englrev.pdf