OPTICAL/NEAR-INFRARED SELECTION OF RED QUASI-STELLAR OBJECTS: EVIDENCE FOR STEEP EXTINCTION CURVES TOWARD GALACTIC CENTERS?
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P. Noterdaeme | J. Fynbo | C. Ledoux | M. Vestergaard | S. Geier | P. Møller | B. Venemans | J. Fynbo | J. Krogager