M. H.  Bhure, Rode, C. V., Chikate, R. C., Patwardhan, N., and Patil, S., ?Phosphotungstic acid as an efficient solid catalyst for intramolecular rearrangement of benzyl phenyl ether to 2-benzyl phenol?, Catalysis Communications, vol. 8, no. 2, pp. 139-144, 2007.