1. Varsha Brahmkhatri, Anjali Patel. 12-Tungstophosphoric acid anchored to SBA-15: An efficient, environmentally benign reusable catalysts for biodiesel production by esterification of free fatty acids. Applied Catalysis A: General Volume 403, Issues 1-2, 22 August 2011, Pages 161-172
- DOI:
http://dx.doi.org/10.1016/j.apcata.2011.06.027
- DOI:
http://dx.doi.org/10.1016/j.apcata.2011.06.029