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2. I. F. Darwin, J. Gilmore, G. Collyer, R. McMahon, G. Harris, C. Zoulas, C. Lowth, E. Fischer, and Various Contributors, “file – determine file type, BSD General Commands Manual, file(1),” BSD, Jan. 1973–2007, man file(1).
3. ——, “file - determine file type,” [online], Mar. 1973-2008, ftp://ftp.astron.com/pub/file/ , last viewed April 2008.
4. S. Mokhov, I. Clement, S. Sinclair, and D. Nicolacopoulos, “Modular Audio Recognition Framework,” Department of Computer Science and Software Engineering, Concordia University, Montreal, Canada, 2002– 2003, project report, http://marf.sf.net , last viewed April 2008.
5. The MARF Research and Development Group, “The Modular Audio Recognition Framework and its Applications,” [online], 2002-2009, http://marf.sf.net , last viewed October 2009.