1. V. P. Grinin, N. N. Kiselev, N. Kh. Minikulov, et al., Astrophys. Space Sci. 186, 283 (1991).
2. A. Natta, V. Grinin, and V. Mannings, in Protostars and Planets IV, Ed. by V. Mannings et al. (University of Arizona Press, Tucson, 2000), p. 569.
3. V. P. Grinin, in Disks, Planetesimals and Planets, Ed. by F. Garzon et al., Astron. Soc. Pac. Conf. Ser. 219, p. 216 (2000).
4. V. P. Grinin, Pis’ma Astron. Zh. 14, 65 (1988) [Sov. Astron. Lett. 14, 27 (1988)].
5. N. V. Voshchinnikov, V. P. Grinin, and V. V. Karjukin, Astron. Astrophys. 294, 547 (1995).