Davies, J. I.; Auld, R.; Burns, L.; Minchin, R.; Momjian, E.; Schneider, S.; Smith, M.; Taylor, R.; van Driel, W. (1 Ağustos 2011). "The Arecibo Galaxy Environment Survey - IV. The NGC 7448 region and the HI mass function". Monthly Notices of the Royal Astronomical Society. 415 (2). ss. 1883-1894. Bibcode:2011MNRAS.415.1883D. doi:10.1111/j.1365-2966.2011.18833.x.
Davies, J. I.; Auld, R.; Burns, L.; Minchin, R.; Momjian, E.; Schneider, S.; Smith, M.; Taylor, R.; van Driel, W. (1 Ağustos 2011). "The Arecibo Galaxy Environment Survey - IV. The NGC 7448 region and the HI mass function". Monthly Notices of the Royal Astronomical Society. 415 (2). ss. 1883-1894. Bibcode:2011MNRAS.415.1883D. doi:10.1111/j.1365-2966.2011.18833.x.