The origin of R CrA variability - A complex triple system hosting a disk E. Sissa, R. Gratton, J. M. Alcalà, S. Desidera, S. Messina, D. Mesa, V. D’Orazi and E. Rigliaco A&A, 630 (2019) A132 Published online: 04 October 2019 DOI: 10.1051/0004-6361/201936101