1. A. P. Dunlop and F. N. Peters, The Furans, Reinhold, New York (1953).
2. A. A. Ponomarev, Syntheses and Reactions of Furan Substances [in Russian], Izd. SGU, Saratov (1960).
3. É. Ya. Lukevits (ed.), Advances in the Chemistry of Furans [in Russian], Zinatne, Riga (1978).
4. F. M. Dean, Adv. Heterocycl. Chem.,30, 167 (1982).
5. F. M. Dean, Adv. Heterocycl. Chem.,31, 237 (1982).