Absorption of high-energy gamma rays in Cygnus X-3B. Cerutti, G. Dubus, J. Malzac, A. Szostek, R. Belmont, A. A. Zdziarski and G. HenriA&A, 529 (2011) A120DOI: https://doi.org/10.1051/0004-6361/201116581