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ROCKY MOUNTAIN JOURNAL OF MATHEMATICS, vol.39, no.6, pp.2067-2071, 2009 (SCI-Expanded)
Let X be a GO-space. We give a direct proof of the following fact: If O is an open cover of X, then O has a sigma-disjoint open, partial refinement V such that X\ U V is the union of a discrete family of stationary subsets of regular uncountable cardinals.