1. Abarca, M.L., Bragulat, M.R., Castella, G. and Cabanes, F.J., 1994. Ochratoxin A production by strains of Aspergillus niger var. niger. Applied and Environmental Microbiology 60: 2650-2652.
2. Abramson, D., Mills, J.T. and Boycott, B.R., 1983. Mycotoxins and mycoflora in animal feedstuffs in Western Canada. Canadian Journal of Comparative medicine 41: 23-26.
3. Occurrence of Aspergillus species in mixed feeds and component raw materials and their ability to produce ochratoxin A