The supergiant B[e] star LHA 115-S 18 – binary and/or luminous blue variable? J. S. Clark, E. S. Bartlett, M. J. Coe, R. Dorda, F. Haberl, J. B. Lamb, I. Negueruela and A. Udalski A&A, 560 (2013) A10 Published online: 28 November 2013 DOI: 10.1051/0004-6361/201321216