G. Giuricin; C. Marinoni; L. Ceriani, et al. Nearby Optical Galaxies: Selection of the Sample and Identification of Groups. S. 178–194. Astrophysical Journal [online]. Listopad 2000 [cit. 2017-11-02]. Roč. 543, čís. 1, s. 178–194. Dostupné online. arXivastro-ph/0001140. DOI10.1086/317070. Bibcode2000ApJ...543..178G. (anglicky)
caltech.edu
ned.ipac.caltech.edu
NASA/IPAC Extragalactic Database: Results for NGC 0628 Group [online]. [cit. 2017-11-01]. Dostupné online. (anglicky)
NASA/IPAC Extragalactic Database: Results for Various Galaxies [online]. [cit. 2017-11-02]. Dostupné online. (anglicky)
doi.org
dx.doi.org
G. Giuricin; C. Marinoni; L. Ceriani, et al. Nearby Optical Galaxies: Selection of the Sample and Identification of Groups. S. 178–194. Astrophysical Journal [online]. Listopad 2000 [cit. 2017-11-02]. Roč. 543, čís. 1, s. 178–194. Dostupné online. arXivastro-ph/0001140. DOI10.1086/317070. Bibcode2000ApJ...543..178G. (anglicky)
harvard.edu
adsabs.harvard.edu
A. Garcia. General study of group membership. II - Determination of nearby groups. S. 47–90. Astronomy and Astrophysics Supplement [online]. Červenec 1993 [cit. 2017-11-02]. Roč. 100, s. 47–90. Dostupné online. Bibcode1993A&AS..100...47G. (anglicky)
G. Giuricin; C. Marinoni; L. Ceriani, et al. Nearby Optical Galaxies: Selection of the Sample and Identification of Groups. S. 178–194. Astrophysical Journal [online]. Listopad 2000 [cit. 2017-11-02]. Roč. 543, čís. 1, s. 178–194. Dostupné online. arXivastro-ph/0001140. DOI10.1086/317070. Bibcode2000ApJ...543..178G. (anglicky)
Fouque, P.; Gourgoulhon, E.; Chamaraux, P., et al. Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members. S. 211–233. Astronomy and Astrophysics Supplement [online]. Květen 1992 [cit. 2017-11-02]. Roč. 93, čís. 2, s. 211–233. Dostupné online. Bibcode1992A&AS...93..211F. (anglicky)
seds.org
messier.seds.org
SEDS Messier Objects Database: Messier 74 [online]. [cit. 2017-11-02]. Dostupné online. (anglicky)