Firstly, I will like to ask you the level at which this said paper is to be presented. By this I mean, is it academic; and again, at what level? Undergraduate studies, masters' level or perhaps a PhD. As a form of reference anyway, websites like that of Diamond Bank (view the section for sitemap) and the Central Bank of Nigeria web portal could I guess come in very handy regarding your quest.
The CBN periodic reports if I have to be specific will guide you a whole lot in your current undertaking. This you can again obtain from their website. In the same vein, visiting the websites of the African Development Bank will in no small measure provide you with bench mark indices to look out for in your ongoing research.
Wishing you the best in your academic quest.

Sorry; but is Ikemefa still on line.