L. S.  Savergave, Mule, S. S., Jogdand, V. V., Nene, S. N., and Gadre, R. V., ?Production and single step purification of cyclodextrin glycosyltransferase from alkalophilic bacillus firmus by ion exchange chromatography?, Biochemical Engineering Journal, vol. 39, no. 3, pp. 510-515, 2008.