Ummadisetti, C., Rachapudi, B. N. P. and Bethala, L. A. P. D. (2014) “Glycerol-based SO3H-Carbon Catalyst: A green recyclable catalyst for the chemoselective synthesis of pentaerythritol diacetals”, European Journal of Chemistry, 5(3), pp. 536–540. doi: 10.5155/eurjchem.5.3.536-540.1028.