QSO Lyman-Alpha Absorbers and Galaxy Halos

QSO mass constraints from gravitational lensing studies of quasar pairs. The cases of Q1548+114 A & B and Q1148+0055 A & B

QSO metal absorption systems as a probe of galaxy formation.

QSO Metal Absorption Systems at High Redshift and the Signature of Hierarchical Galaxy Formation

QSO Narrow [OIII] Line Width and Host Galaxy Luminosity

QSO pairs {\it across} Active galaxies: Evidence of Blueshifts?

QSO Photometric Redshift estimation for the XMM-Newton/2dF Survey

QSO Selection Algorithm Using Time Variability and Machine Learning: Selection of 1,620 QSO Candidates from MACHO LMC Database

QSO Selection and Photometric Redshifts with Neural Networks

QSO selection in the ALHAMBRA survey

QSO size ratios from multiband monitoring of a microlensing high-magnification event

QSO Survey and Reference Frame with Gaia

QSO variability: probing the Starburst model

QSO X-ray spectra and the contribution of QSOs to the X-ray background radiation

QSO's from Galaxy Collisions with Naked Black Holes

QSO-galaxy correlations due to weak lensing in arbitrary Friedmann-Lemaitre cosmologies

QSO-LRG 2-Point Cross-Correlation Function and Redshift-Space Distorions

QSOs and Absorption Line Systems Surrounding the Hubble Deep Field

QSOs and Spheroidal Galaxies

QSOs and the hard x-ray background