1. (a) J. March, Advanced Organic Chemistry, 5th ed. (Wiley, New York, 2001) p. 725. (
2. For reviews see: (b) H.J. Shine, Aromatic Rearrangements (American Elsevier, New York, 1967) pp. 72–82, 365–368.
3. (c) A. Gerecs, in Friedel-Crafts and Related Reactions, Vol. III, ed. G.A. Olah (Interscience, New York, 1964) p. 499.
4. (d) R. Martin, Org. Prep. Proced. Int. 24 (1992) 369 and references there in
5. D’Ans J., Limmer H. (1952) Ber. 85:585