The remarkable light and colour variability of Small Magellanic Cloud Be stars W. J. de Wit, H. J. G. L. M. Lamers, J. B. Marquette and J. P. Beaulieu A&A, 456 3 (2006) 1027-1035 Published online: 06 September 2006 DOI: 10.1051/0004-6361:20065137