1. “Characterization and optimization of -galactosidase immobilization process on a mixed-matrix membrane”. Jochems P, Satyawali Y, van Roy S, Doyen W, Diels L, Dejonghe W, Enzyme and microbial technology 49, 580 (2011).   http://doi.org/10.1016/J.ENZMICTEC.2011.06.010