1. Apel, P.Yu., Radiat. Meas., 2001, vol. 34, p. 559.
2. Apel, P.Yu., Blonskaya, I.V., Oganessian, V.R., Orelovitch, O.L., and Trautmann, C., Nucl. Instrum. Methods Phys. Res. B, 2001, vol. 185, p. 216.
3. Akimenko, S.N., Mamonova, T.I., Orelovich, O.L., Maekawa, Ya., Yoshida, M., and Apel’, P.Yu., Membr., Ser. Krit. Tekhnol., 2002, no. 15, p.21.
4. Apel’, P.Yu., Kolikov, V.M., Kuznetsov, V.I., Mchedlishvili, B.V., Potokin, I.L., and Samoilova, L.I., Kolloidn. Zh., 1985, vol. 47, p. 772.
5. Apel, P.Yu., Blonskaya, I.V., Didyk, A.Yu., Dmitriev, S.N., Orelovitch, O.L., Root, D., Samoilova, L.I., and Vutsadakis, V.A., Nucl. Instrum. Methods Phys. Res. B, 2001, vol. 179, p. 55.