Sisak, Cs., Á. Kovács, B. Szajáni, L. Boross, and L. Orosz. 2003. “Solid-Phase Tryptophan Synthase Biocatalysts and Their Application in Integrated Bioconversion System”. Hungarian Journal of Industry and Chemistry 31 (1). https://hjic.mk.uni-pannon.hu/index.php/hjic/article/view/57.