1. Supermassive Black Holes in Galactic Nuclei: Black Hole Masses and Host Galaxy Properties; Cosmological Evolution of Supermassive Black Holes and Active Galactic Nuclei
   

2. Spectroscopy of Active Galactic Nuclei.
   

3. Mass-metallicity relation in galaxies from zero to high redshift.
   

4. Optical Interferometry: ESO VLT Interferometer and AMBER.
   

An updated list of my refereed publications is available here (sorted by citation count here)