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Search Google Scholar for academic resources; but remember, if it asks you to pay for something, always check CityLibrary Search to see if we have a copy already. If not, then Inter Library Loans will be able to get it for you for much less money.
Some Useful Websites
You don't need to be a member of City to use these resources as they're freely available on the Internet.
ArXiv provides open access to 700,931 e-prints in the subjects of Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics.
The British Library's electronic theses collection. Access to electronic theses and dissertations from UK universities. You must register to download material but it is mostly free.