Brunzendorf, J.; Meusinger, H. (October 1, 1999). «The galaxy cluster Abell 426 (Perseus). A catalogue of 660 galaxy positions, isophotal magnitudes and morphological types» (στα αγγλικά). Astronomy and Astrophysics Supplement Series139 (1): 141–161. doi:10.1051/aas:1999111. ISSN0365-0138. Bibcode: 1999A&AS..139..141B.
Park, Songyoun; Yang, Jun; Oonk, J. B. Raymond; Paragi, Zsolt (2017-03-11). «Discovery of five low-luminosity active galactic nuclei at the centre of the Perseus cluster» (στα αγγλικά). Monthly Notices of the Royal Astronomical Society465 (4): 3943–3948. doi:10.1093/mnras/stw3012. ISSN0035-8711. Bibcode: 2017MNRAS.465.3943P.
Beasley, Michael A.; Trujillo, Ignacio; Leaman, Ryan; Montes, Mireia (2018-03-12). «A single population of red globular clusters around the massive compact galaxy NGC 1277» (στα αγγλικά). Nature555 (7697): 483–486. doi:10.1038/nature25756. ISSN0028-0836. PMID29531319. Bibcode: 2018Natur.555..483B.
Brunzendorf, J.; Meusinger, H. (October 1, 1999). «The galaxy cluster Abell 426 (Perseus). A catalogue of 660 galaxy positions, isophotal magnitudes and morphological types» (στα αγγλικά). Astronomy and Astrophysics Supplement Series139 (1): 141–161. doi:10.1051/aas:1999111. ISSN0365-0138. Bibcode: 1999A&AS..139..141B.
Park, Songyoun; Yang, Jun; Oonk, J. B. Raymond; Paragi, Zsolt (2017-03-11). «Discovery of five low-luminosity active galactic nuclei at the centre of the Perseus cluster» (στα αγγλικά). Monthly Notices of the Royal Astronomical Society465 (4): 3943–3948. doi:10.1093/mnras/stw3012. ISSN0035-8711. Bibcode: 2017MNRAS.465.3943P.
Beasley, Michael A.; Trujillo, Ignacio; Leaman, Ryan; Montes, Mireia (2018-03-12). «A single population of red globular clusters around the massive compact galaxy NGC 1277» (στα αγγλικά). Nature555 (7697): 483–486. doi:10.1038/nature25756. ISSN0028-0836. PMID29531319. Bibcode: 2018Natur.555..483B.
Beasley, Michael A.; Trujillo, Ignacio; Leaman, Ryan; Montes, Mireia (2018-03-12). «A single population of red globular clusters around the massive compact galaxy NGC 1277» (στα αγγλικά). Nature555 (7697): 483–486. doi:10.1038/nature25756. ISSN0028-0836. PMID29531319. Bibcode: 2018Natur.555..483B.
Brunzendorf, J.; Meusinger, H. (October 1, 1999). «The galaxy cluster Abell 426 (Perseus). A catalogue of 660 galaxy positions, isophotal magnitudes and morphological types» (στα αγγλικά). Astronomy and Astrophysics Supplement Series139 (1): 141–161. doi:10.1051/aas:1999111. ISSN0365-0138. Bibcode: 1999A&AS..139..141B.
Park, Songyoun; Yang, Jun; Oonk, J. B. Raymond; Paragi, Zsolt (2017-03-11). «Discovery of five low-luminosity active galactic nuclei at the centre of the Perseus cluster» (στα αγγλικά). Monthly Notices of the Royal Astronomical Society465 (4): 3943–3948. doi:10.1093/mnras/stw3012. ISSN0035-8711. Bibcode: 2017MNRAS.465.3943P.
Beasley, Michael A.; Trujillo, Ignacio; Leaman, Ryan; Montes, Mireia (2018-03-12). «A single population of red globular clusters around the massive compact galaxy NGC 1277» (στα αγγλικά). Nature555 (7697): 483–486. doi:10.1038/nature25756. ISSN0028-0836. PMID29531319. Bibcode: 2018Natur.555..483B.