The circumstellar environment of HD 50138 revealed by VLTI/AMBER at high angular resolution M. Koutoulaki, R. Garcia Lopez, A. Natta, A. Caratti o Garatti, D. Coffey, J. Sanchez-Bermudez and T. P. Ray A&A, 614 (2018) A90 Published online: 22 June 2018 DOI: 10.1051/0004-6361/201832814