1. Capella, A., Tran Than Van, J.: Z. Phys. C — Particles and Fields 18 (1983) 85; Capella, A. et al. Z. Phys. C — Particles and Fields 3 (1980) 329; Capella, A., Tran Than Van J., Z. Phys. C — Particles and Fields 10 (1981) 249; Phys. Lett. 114B (1982) 450
2. Kaidalov, A.B.: Pisma ZhETF 32 (1980) 494; Yad. Fiz. 33 (1981) 1369; Phys. Lett 116B (1982) 454; Preprint ITEP-116, 1984; Kaidalov, A.B., Ter-Martirosyan, K.A.: Yad. Fiz. 39 (1984) 1545; Yad. Fiz. 40 (1984) 211; Kaidalov, A.B., Piskunova, O.I.: Z. Phys. C — Particles and Fields 30 (1986) 145
3. Ter-Martirosyan, K.A.: Phys. Lett 44B (1973) 377
4. Abramovsky, V.A., Gribov, V.N., Kancheli, O.V.: Yad. Fiz. 18 (1973) 595
5. Kaidalov, A.B., Ter-Martirosyan, K.A., Shabelsku, Yu-M.: Yad. Fiz. 43 (1986) 1282, Shabelsky, Yu.M.: Yad. Fiz. 45 (1987) 223