The light variability of the helium strong star HD 37776 as a result of its inhomogeneous elemental surface distributionJ. Krtička, Z. Mikulášek, J. Zverko and J. ŽižňovskýA&A, 470 3 (2007) 1089-1098DOI: https://doi.org/10.1051/0004-6361:20066627