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Astron. Astrophys. 361, 781-787 (2000)
Acknowledgements
It is a pleasure to thank Ramesh Narayan for many useful discussion at the various stages of this work and for providing us the numerical code for the global solution. One of us (J.R.B) would like to thank E. Quataert for some useful tips in handling the code. We would like to thank the referee of this paper for providing very useful criticism which has helped us in improving our presentation.
© European Southern Observatory (ESO) 2000
Online publication: October 2, 2000
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