![]() | ![]() |
Astron. Astrophys. 339, L85-L88 (1998) AcknowledgementsIt is a pleasure to thank Yuri Baryshev, Alessandro Melchiorri, Luciano Pietronero, Pekka Teerikorpi and Filippo Vernizzi for valuable discussions and comments. This work has been partially supported by the EEC TMR Network "Fractal structures and self-organization" ERBFMRXCT980183 and by the Swiss NSF. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: October 22, 1998 ![]() |