Near-IR follow-up spectra of a subsample of quasars reported in this paper (sorted by increasing redshift). We show the NIR spectra of the newly discovered quasars PSO J041+06, PSO J335−15, PSO J067−14, PSO J217+04, PSO J037−08, and PSO J289+50 and the newly published NIR spectrum for the already known quasar PSO J162−01. The noise spectra are reported in gray. The shaded light gray areas highlight regions that are strongly affected by telluric absorption. The location of the main emission lines according to the Mg II redshift is also shown at the top: Lyman-α+N V (dashed), C IV (dotted), and Mg II (dash-dotted).