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Hayes, Barry and Ringwood, John (2009) Authenticating student work in an e-learning programme via speaker recognition. Signals, Circuits and Systems (SCS), 2009 3rd International Conference. Print ISBN: 978-1-4244-4397-0 . pp. 1-6.
Hayes, Barry and Ringwood, John (2008) Student Authentication for Oral Assessment in Distance Learning Programs. IEEE Transactions on Learning Technologies, 1 (3). pp. 165-175. ISSN 1939-1382