Investigating the past history of EXors: the cases of V1118 Orionis, V1143 Orionis, and NY Orionis R. Jurdana-Šepić, U. Munari, S. Antoniucci, T. Giannini, G. Li Causi and D. Lorenzetti A&A, 602 (2017) A99 Published online: 21 June 2017 DOI: 10.1051/0004-6361/201630314