1. Kourim, P., Vacek, K.: Tetrahedron Letters 1962, 1051.
2. Cole, T., Kushida, T., Heller, H.C.: J. Chem. Phys. 38 (1963) 2915.
3. Griffith, O.F., Shields, H.: Radiation Res. 20 (1963) 443.
4. Kazanskii, V.B., Pariiskii, G.B., Aleksandrov, I.V., Zhidomirov, G.M.: Fiz. Tverd. Tela 5 (1963) 649; Soviet Phys.-Solid State (English Transl.) 5 (1963) 473.
5. Shelimov, B.N., Fok, N.V., Voevodskii, V.V.: Kinetika i Kataliz 4 (1963) 539; Kinetics Catalysis USSR (English Transl.) 4 (1963) 473.