# Q90991772
**Wikidata**: [Q90991772](https://www.wikidata.org/wiki/Q90991772)  
**Source**: https://4ort.xyz/entity/q90991772


## References

1. SIMBAD
2. Optical spectroscopy and polarization of a new sample of optically bright flat radio spectrum sources
3. A new sample of large angular size radio galaxies. I. The radio data
4. The Two Micron All Sky Survey (2MASS)
5. Gaia Data Release 2
6. Groups of Galaxies in the Two Micron All Sky Redshift Survey
7. Galaxy groups: a 2MASS catalog