Chandra and ALMA observations of the nuclear activity in two strongly lensed star-forming galaxiesM. Massardi, A. F. M. Enia, M. Negrello, C. Mancuso, A. Lapi, C. Vignali, R. Gilli, S. Burkutean, L. Danese and G. De ZottiA&A, 610 (2018) A53DOI: https://doi.org/10.1051/0004-6361/201731751