Discovery of a double ring in the core of η Carinae
S. Hony, C. Dominik, L. B. F. M. Waters, V. Icke, G. Mellema, R. van Boekel, A. de Koter, P. M. Morris, M. Barlow, P. Cox and H. U. Käufl
A&A, 377 1 (2001) L1-L4
DOI: https://doi.org/10.1051/0004-6361:20011168
