1. Abramenko, V.I. and Baranovsky E.A., Solar Phys., 2004, vol. 220,issue 1, p. 81.
2. Alikaeva, K.V. and Kondrashova, N.N., Kinemat. Fiz. Nebesn. Tel, 2006, vol. 22, no. 3, p. 163.
3. Andriets, E.S., V3sn. Kiev. Univ. Astron., 2011, no. 47, p. 14.
4. Baranovsky, E.A., Lozitska, N.I., and Lozitsky, V.G., Kinemat. Fiz. Nebesn. Tel, 1991, vol. 7, no. 3, p. 52.
5. Baranovsky, E.A., Kondrashova, N.N., and Pasechnik, M.N., Kinem. Fiz. Nebesn. Tel, 2000, vol. 16, no. 5, p. 387.