0 citations0 referencesGoogle Scholardoi.orgInfrared observations of the X-ray quasars 0241 + 622 and MR2251–178Nature·1979·Vol. 278(5701), pp. 231–232Citations Over TimeB. T. Soifer, G. Neugebauer, K. MatthewsRelated Papers→ High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data(1999)152 cited→ First observation of a quasar with a redshift of 4(1987)72 cited→ Using Quasars as Standard Clocks for Measuring Cosmological Redshift(2012)26 cited→ The Quasar Redshift Limit(1983)