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Campbell, N., Reece, J., Urry, L., Cain, M., Wasserman, S., Minorsky, P., Jackson, R.  2009.  Biology.  Eight Edition.  P. 636, 644, 651. 

Jacques, N., Casaregola, S.  2007.  Safety Assessment of Dairy Microorganisms: The Hemiascomycetous yeasts.  SciVerse.

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Sharon, A.  2010. Molecular and Cell biology Methods for Fungi.  Humana Press. 

Volk, T, Galbraith, A.  December 2002. Tom Volk’s Fungus of the Month for December 2002. University of Wisconsin La Crosse. 3/5/12.

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