M. A. A. da Cunha, S. S. da Silva, W. de Carvalho, and J. C. dos Santos, “Use of PVA-gel immobilized cells: a new strategy for biotechnological production of Xylitol from sugarcane bagasse hidrolysate”, Semina: Ciênc. Agrár., vol. 26, no. 1, pp. 61–70, Jul. 2005.