1. L.Anshutz, E.Klein, and G.Cermak, Ber.,77, 726 (1944).
2. A.Michaelis, Ber.,118, 898 (1885).
3. N.I.Rizpolozhenskii, Some Problems in Organic Chemistry [in Russian], Izd.Kazansk.Univ.(1964), p.122.
4. F.S.Mukhametov, N.I.Rizpolozhenskii, and É.I.Gol'dfarb, Izv.Akad.Nauk SSSR, Ser.Khim.,1971, 2221.
5. B.A.Arbuzov, N.I.Rizpolozhenskii, A.O.Vizel, K.M.Ivanovskaya, F.S.Mukhametov, and É.I.Gol'dfarb, Izv.Akad.Nauk SSSR, Ser.Khim.,1971, 117.