Astron. Astrophys. 321, 703-712 (1997)

Acknowledgements

We would like to thank S. Caracciolo for helpful discussions and J. Schmidt for suggesting the idea at the basis of the method outlined in Appendix B. This work has been partially supported by CNR and MURST of Italy.

© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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