HD 17156b: a transiting planet with a 21.2-day period and an eccentric orbitM. Barbieri, R. Alonso, G. Laughlin, J. M. Almenara, R. Bissinger, D. Davies, D. Gasparri, E. Guido, C. Lopresti, F. Manzini and G. SosteroA&A, 476 2 (2007) L13-L16DOI: https://doi.org/10.1051/0004-6361:20078787