1. Koleva M., Kolev D. (1985)Polyssaccharides. “Nauka i izkustvo”, Sofia, 242–244.
2. Coughlan M.P., Tuohy M.G., Filho E.X.F, Puls J., Claeyssens M., Vrsanska M., Hughes M.M. (1993) In:Hemicellulose and Hemicellulases(M.P Coughlan, G.P. Hazlewood, eds.), Portland Press, London, 53–84.
3. Xylan-hydrolysing enzymes from thermophilic and mesophilic fungi
4. Raper K.B., Fennel D.I. (1965) The genusAspergillus.The Williams & Wilkins Co, Baltimore, 357–404.