Bank for International Settlements – The Role of Central Bank Money in Payment Systems. See page 9, titled, "The coexistence of central and commercial bank monies: multiple issuers, one currency": http://www.bis.org/publ/cpss55.pdf
A quick quote in reference to the two different types of money is listed on page 3. It is the first sentence of the document:
European Central Bank – "Domestic payments in Euroland: commercial and central bank money": "At the beginning of the 20th almost the totality of retail payments were made in central bank money. Over time, this monopoly came to be shared with commercial banks, when deposits and their transfer via checks and giros became widely accepted. Banknotes and commercial bank money became fully interchangeable payment media that customers could use according to their needs. While transaction costs in commercial bank money were shrinking, cashless payment instruments became increasingly used, at the expense of banknotes"
"Handbook of Statistics on Indian Economy". See the document at the bottom of the page titled, "Notes on Tables". The definitions are on the fourth page of the document
