1. F. Martin, A. Tokovinin, A. Ziad, et al., Astron. Astrophys. 336, L49 (1998).
2. P. V. Shcheglov, Problems in Optical Astronomy [in Russian] (Nauka, Moscow, 1980).
3. S. P. Il'yasov, A. K. Baidzhumanov, M. Sarazin, et al., Pis'ma Astron. Zh. 25, 156 (1999) [Astron. Lett. 25, 122 (1999)].
4. M. Sarazin, http://www.eso.org/gen-fac/pubs/astclim/paranal .
5. C. Munoz-Tunon, J. Vernin, and A. M. Varela, Astron. Astrophys., Suppl. Ser. 125, 183 (1997).