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Astron. Astrophys. 351, 185-191 (1999) AcknowledgementsThis work is partially supported by `Analytical and Numerical studies of astrophysical flows around black holes and neutron stars', a project funded by the Department of Science and Technology, and by `Quasi-Periodic Oscillations of Black Hole Candidates', a project funded by the Indian Space Research Organization. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: November 2, 1999 ![]() |