Signs of strong Na and K absorption in the transmission spectrum of WASP-103b M. Lendl, P. E. Cubillos, J. Hagelberg, A. Müller, I. Juvan and L. Fossati A&A, 606 (2017) A18 Published online: 28 September 2017 DOI: 10.1051/0004-6361/201731242