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Article Contents

ABSTRACT

1.INTRODUCTION

2.THE COSMIC X-RAY BACKGROUND MEASUREMENTS

3.AGN POPULATION SYNTHESIS MODELS

4.THE DEEP X-RAY SURVEYS
4.1.The sources populating the Deep Surveys
4.2.The source redshift distribution

5.DO OBSCURED AGN EVOLVE LIKE STARBURST GALAXIES?

6.CONCLUSIONS

REFERENCES