Biomass hydrolysis over nanoporous hybrid catalysts on the base of heteropolyacids - L. V. Holovko; T. V. Tkachenko; D. V. Molodyi; V. A. Povazhnyi; O. V. Melnychuk; T. V. Lysukho; V. P. Kukhar (Catalysis and Petrochemistry, 2012)