Back to the Abstract

	1 Introduction
	2 The Mass-Luminosity relation in the ``thin disc" model
	3 What can be wrong with this analysis?
	4 Spectral distribution predicted for accretion discs
	5 First possibility: Super-Eddington accretion rates
	6 Second possibility: The Blue Bump is not emitted by gravitational release of energy
	7 Third possibility: Completely non standard discs
	8 Conclusion
	References