V. De Bruyne, H. Dejonghe, A. Pizzella, M. Bernardi, and W. W. Zeilinger.
Toward an Alternative Way of Looking at Elliptical Galaxies: Case Studies for NGC 4649 and NGC 7097
(англ.)
//
The Astrophysical Journal
. —
IOP Publishing
, 2001. —
doi
:
.
T. V. Ricci, J. E. Steiner, and R. B. Menezes.
NGC 7097: The Active Galactic Nucleus and its Mirror, Revealed by Principal Component Analysis Tomography
(англ.)
//
The Astrophysical Journal
. —
IOP Publishing
, 2011. —
doi
:
. —
arXiv
:
.