Search for spectroscopical signatures of transiting HD 209458b's exosphereC. Moutou, A. Coustenis, J. Schneider, R. St Gilles, M. Mayor, D. Queloz and A. KauferA&A, 371 1 (2001) 260-266DOI: https://doi.org/10.1051/0004-6361:20010406