1. Alekseev, Yu. I., Bahanov, Yu. P., Bobkov, M. V., Bunin, V. D., Novikov, A. Yu. and Podlipnoy, G. S.: 1978,XIth Soviet Radio Astronomers Conf. (Abstracts), Yerevan, p. 56.
2. Backer, D. C.: 1972,Astrophys. J. 174, L157.
3. Bartel, N., Sieber, W. and Wielebinski, R.: 1978,Astron. Astrophys. 68, 361.
4. Bobkov, M. V., Dobish, G. I. and Kokarev, V. V.: 1978,XIth Soviet Radio Astronomers Conf. (Abstracts), Yerevan, p. 57.
5. Bruck, Yu. M., Davis, J. G., Kuzmin, A. D., Lyne, A. G., Malofeev, V. M., Rowson, B., Ustimenko, B. Yu. and Shitov, Yu. P.: 1978,Soviet Astron. J. 55, 1031.